Use cpp macros for the "application/grpc" string and its length. Also remove unnecessary strlen() call.
Use cpp macros for the "application/grpc" string and its length.
Also remove unnecessary strlen() call.

thinkerou/grpc,wcevans/grpc,pmarks-net/grpc,firebase/grpc,vjpai/grpc,pmarks-net/grpc,thunderboltsid/grpc,pszemus/grpc,carl-mastrangelo/grpc,apolcyn/grpc,leifurhauks/grpc,simonkuang/grpc,chrisdunelm/grpc,goldenbull/grpc,7anner/grpc,arkmaxim/grpc,kpayson64/grpc,nicolasnoble/grpc,jboeuf/grpc,ipylypiv/grpc,dklempner/grpc,apolcyn/grpc,daniel-j-born/grpc,murgatroid99/grpc,soltanmm/grpc,vsco/grpc,Vizerai/grpc,grpc/grpc,murgatroid99/grpc,firebase/grpc,grani/grpc,ejona86/grpc,bogdandrutu/grpc,kskalski/grpc,grpc/grpc,infinit/grpc,MakMukhi/grpc,ctiller/grpc,mehrdada/grpc,kskalski/grpc,quizlet/grpc,MakMukhi/grpc,Vizerai/grpc,adelez/grpc,goldenbull/grpc,7anner/grpc,rjshade/grpc,ctiller/grpc,muxi/grpc,leifurhauks/grpc,grani/grpc,murgatroid99/grpc,podsvirov/grpc,MakMukhi/grpc,chrisdunelm/grpc,perumaalgoog/grpc,vjpai/grpc,vjpai/grpc,geffzhang/grpc,ppietrasa/grpc,pmarks-net/grpc,baylabs/grpc,thinkerou/grpc,podsvirov/grpc,kumaralokgithub/grpc,PeterFaiman/ruby-grpc-minimal,kpayson64/grpc,msmania/grpc,philcleveland/grpc,Crevil/grpc,thunderboltsid/grpc,jcanizales/grpc,bogdandrutu/grpc,dgquintas/grpc,carl-mastrangelo/grpc,grpc/grpc,7anner/grpc,Crevil/grpc,ppietrasa/grpc,dgquintas/grpc,andrewpollock/grpc,pszemus/grpc,a-veitch/grpc,mehrdada/grpc,malexzx/grpc,vjpai/grpc,a11r/grpc,mehrdada/grpc,goldenbull/grpc,adelez/grpc,dklempner/grpc,goldenbull/grpc,yongni/grpc,ppietrasa/grpc,andrewpollock/grpc,chrisdunelm/grpc,ejona86/grpc,zhimingxie/grpc,yang-g/grpc,simonkuang/grpc,yugui/grpc,dgquintas/grpc,goldenbull/grpc,sreecha/grpc,kumaralokgithub/grpc,dgquintas/grpc,msmania/grpc,ncteisen/grpc,murgatroid99/grpc,jboeuf/grpc,vjpai/grpc,kpayson64/grpc,carl-mastrangelo/grpc,goldenbull/grpc,pmarks-net/grpc,PeterFaiman/ruby-grpc-minimal,muxi/grpc,mehrdada/grpc,dklempner/grpc,hstefan/grpc,stanley-cheung/grpc,philcleveland/grpc,wcevans/grpc,grani/grpc,deepaklukose/grpc,pmarks-net/grpc,kumaralokgithub/grpc,a-veitch/grpc,kskalski/grpc,grpc/grpc,kskalski/grpc,pmarks-net/grpc,nicolasnoble/grpc,y-zeng/grpc,perumaalgoog/grpc,greasypizza/grpc,royalharsh/grpc,wcevans/grpc,simonkuang/grpc,greasypizza/grpc,yugui/grpc,ejona86/grpc,ejona86/grpc,kpayson64/grpc,jcanizales/grpc,quizlet/grpc,matt-kwong/grpc,soltanmm-google/grpc,jtattermusch/grpc,thinkerou/grpc,tengyifei/grpc,deepaklukose/grpc,thunderboltsid/grpc,deepaklukose/grpc,royalharsh/grpc,kumaralokgithub/grpc,ipylypiv/grpc,soltanmm-google/grpc,perumaalgoog/grpc,adelez/grpc,ejona86/grpc,vsco/grpc,y-zeng/grpc,wcevans/grpc,baylabs/grpc,nicolasnoble/grpc,kriswuollett/grpc,7anner/grpc,philcleveland/grpc,murgatroid99/grpc,muxi/grpc,LuminateWireless/grpc,kpayson64/grpc,muxi/grpc,rjshade/grpc,arkmaxim/grpc,malexzx/grpc,grpc/grpc,infinit/grpc,philcleveland/grpc,chrisdunelm/grpc,mehrdada/grpc,sreecha/grpc,ncteisen/grpc,arkmaxim/grpc,rjshade/grpc,soltanmm-google/grpc,malexzx/grpc,bogdandrutu/grpc,jboeuf/grpc,donnadionne/grpc,jtattermusch/grpc,msmania/grpc,PeterFaiman/ruby-grpc-minimal,greasypizza/grpc,jtattermusch/grpc,geffzhang/grpc,baylabs/grpc,ipylypiv/grpc,matt-kwong/grpc,a11r/grpc,ncteisen/grpc,pmarks-net/grpc,hstefan/grpc,hstefan/grpc,carl-mastrangelo/grpc,mehrdada/grpc,7anner/grpc,makdharma/grpc,perumaalgoog/grpc,infinit/grpc,murgatroid99/grpc,apolcyn/grpc,zhimingxie/grpc,Vizerai/grpc,carl-mastrangelo/grpc,y-zeng/grpc,vsco/grpc,fuchsia-mirror/third_party-grpc,adelez/grpc,grpc/grpc,malexzx/grpc,soltanmm/grpc,yongni/grpc,zhimingxie/grpc,muxi/grpc,baylabs/grpc,perumaalgoog/grpc,quizlet/grpc,vsco/grpc,baylabs/grpc,vjpai/grpc,daniel-j-born/grpc,leifurhauks/grpc,thinkerou/grpc,ctiller/grpc,carl-mastrangelo/grpc,dklempner/grpc,infinit/grpc,sreecha/grpc,tengyifei/grpc,apolcyn/grpc,daniel-j-born/grpc,donnadionne/grpc,ctiller/grpc,arkmaxim/grpc,dklempner/grpc,ctiller/grpc,geffzhang/grpc,soltanmm/grpc,donnadionne/grpc,jtattermusch/grpc,Crevil/grpc,zhimingxie/grpc,ncteisen/grpc,dklempner/grpc,perumaalgoog/grpc,MakMukhi/grpc,andrewpollock/grpc,kskalski/grpc,stanley-cheung/grpc,y-zeng/grpc,kriswuollett/grpc,mehrdada/grpc,ipylypiv/grpc,soltanmm/grpc,thunderboltsid/grpc,leifurhauks/grpc,murgatroid99/grpc,y-zeng/grpc,MakMukhi/grpc,podsvirov/grpc,geffzhang/grpc,grpc/grpc,donnadionne/grpc,kumaralokgithub/grpc,msmania/grpc,vjpai/grpc,jtattermusch/grpc,philcleveland/grpc,ctiller/grpc,firebase/grpc,fuchsia-mirror/third_party-grpc,LuminateWireless/grpc,greasypizza/grpc,thunderboltsid/grpc,kpayson64/grpc,podsvirov/grpc,mehrdada/grpc,leifurhauks/grpc,mehrdada/grpc,hstefan/grpc,vjpai/grpc,y-zeng/grpc,yang-g/grpc,MakMukhi/grpc,vsco/grpc,tengyifei/grpc,kpayson64/grpc,yugui/grpc,muxi/grpc,rjshade/grpc,goldenbull/grpc,ncteisen/grpc,malexzx/grpc,royalharsh/grpc,hstefan/grpc,yongni/grpc,kpayson64/grpc,quizlet/grpc,zhimingxie/grpc,kumaralokgithub/grpc,chrisdunelm/grpc,Vizerai/grpc,rjshade/grpc,arkmaxim/grpc,matt-kwong/grpc,wcevans/grpc,hstefan/grpc,kriswuollett/grpc,ncteisen/grpc,chrisdunelm/grpc,ppietrasa/grpc,malexzx/grpc,mehrdada/grpc,tengyifei/grpc,pszemus/grpc,firebase/grpc,pmarks-net/grpc,Crevil/grpc,muxi/grpc,ejona86/grpc,PeterFaiman/ruby-grpc-minimal,tengyifei/grpc,grpc/grpc,a-veitch/grpc,a11r/grpc,ctiller/grpc,Crevil/grpc,ppietrasa/grpc,a11r/grpc,ctiller/grpc,sreecha/grpc,sreecha/grpc,vsco/grpc,tengyifei/grpc,LuminateWireless/grpc,jboeuf/grpc,chrisdunelm/grpc,apolcyn/grpc,fuchsia-mirror/third_party-grpc,Vizerai/grpc,ipylypiv/grpc,goldenbull/grpc,kskalski/grpc,thinkerou/grpc,firebase/grpc,makdharma/grpc,firebase/grpc,leifurhauks/grpc,kriswuollett/grpc,grpc/grpc,a-veitch/grpc,tengyifei/grpc,podsvirov/grpc,quizlet/grpc,y-zeng/grpc,infinit/grpc,7anner/grpc,quizlet/grpc,kriswuollett/grpc,soltanmm-google/grpc,ipylypiv/grpc,jcanizales/grpc,jtattermusch/grpc,LuminateWireless/grpc,hstefan/grpc,tengyifei/grpc,greasypizza/grpc,LuminateWireless/grpc,Crevil/grpc,ejona86/grpc,pszemus/grpc,apolcyn/grpc,zhimingxie/grpc,pszemus/grpc,muxi/grpc,rjshade/grpc,soltanmm-google/grpc,stanley-cheung/grpc,Crevil/grpc,fuchsia-mirror/third_party-grpc,a-veitch/grpc,zhimingxie/grpc,quizlet/grpc,jcanizales/grpc,firebase/grpc,stanley-cheung/grpc,carl-mastrangelo/grpc,grani/grpc,matt-kwong/grpc,jtattermusch/grpc,stanley-cheung/grpc,soltanmm/grpc,rjshade/grpc,zhimingxie/grpc,fuchsia-mirror/third_party-grpc,PeterFaiman/ruby-grpc-minimal,kpayson64/grpc,PeterFaiman/ruby-grpc-minimal,vsco/grpc,donnadionne/grpc,Vizerai/grpc,LuminateWireless/grpc,y-zeng/grpc,nicolasnoble/grpc,msmania/grpc,soltanmm/grpc,adelez/grpc,grpc/grpc,kumaralokgithub/grpc,geffzhang/grpc,firebase/grpc,geffzhang/grpc,fuchsia-mirror/third_party-grpc,geffzhang/grpc,Crevil/grpc,jboeuf/grpc,andrewpollock/grpc,grpc/grpc,yang-g/grpc,LuminateWireless/grpc,fuchsia-mirror/third_party-grpc,hstefan/grpc,nicolasnoble/grpc,kskalski/grpc,quizlet/grpc,makdharma/grpc,tengyifei/grpc,donnadionne/grpc,msmania/grpc,PeterFaiman/ruby-grpc-minimal,fuchsia-mirror/third_party-grpc,fuchsia-mirror/third_party-grpc,infinit/grpc,baylabs/grpc,pszemus/grpc,grani/grpc,wcevans/grpc,matt-kwong/grpc,kriswuollett/grpc,kriswuollett/grpc,carl-mastrangelo/grpc,grani/grpc,jboeuf/grpc,quizlet/grpc,soltanmm/grpc,deepaklukose/grpc,donnadionne/grpc,andrewpollock/grpc,yang-g/grpc,yongni/grpc,arkmaxim/grpc,ctiller/grpc,soltanmm-google/grpc,muxi/grpc,thinkerou/grpc,geffzhang/grpc,y-zeng/grpc,andrewpollock/grpc,stanley-cheung/grpc,bogdandrutu/grpc,deepaklukose/grpc,kpayson64/grpc,stanley-cheung/grpc,yugui/grpc,wcevans/grpc,chrisdunelm/grpc,apolcyn/grpc,bogdandrutu/grpc,MakMukhi/grpc,stanley-cheung/grpc,dklempner/grpc,zhimingxie/grpc,firebase/grpc,pszemus/grpc,jtattermusch/grpc,arkmaxim/grpc,jboeuf/grpc,simonkuang/grpc,ctiller/grpc,makdharma/grpc,donnadionne/grpc,royalharsh/grpc,muxi/grpc,yang-g/grpc,baylabs/grpc,deepaklukose/grpc,grani/grpc,firebase/grpc,infinit/grpc,perumaalgoog/grpc,dgquintas/grpc,PeterFaiman/ruby-grpc-minimal,simonkuang/grpc,yang-g/grpc,chrisdunelm/grpc,greasypizza/grpc,vjpai/grpc,murgatroid99/grpc,kriswuollett/grpc,vjpai/grpc,jtattermusch/grpc,LuminateWireless/grpc,jboeuf/grpc,kskalski/grpc,soltanmm-google/grpc,deepaklukose/grpc,carl-mastrangelo/grpc,a11r/grpc,yongni/grpc,dklempner/grpc,bogdandrutu/grpc,ncteisen/grpc,nicolasnoble/grpc,soltanmm-google/grpc,MakMukhi/grpc,LuminateWireless/grpc,makdharma/grpc,yang-g/grpc,arkmaxim/grpc,kskalski/grpc,pszemus/grpc,sreecha/grpc,infinit/grpc,deepaklukose/grpc,jcanizales/grpc,jcanizales/grpc,greasypizza/grpc,yugui/grpc,greasypizza/grpc,daniel-j-born/grpc,baylabs/grpc,thunderboltsid/grpc,chrisdunelm/grpc,hstefan/grpc,thinkerou/grpc,donnadionne/grpc,sreecha/grpc,msmania/grpc,yang-g/grpc,leifurhauks/grpc,ipylypiv/grpc,MakMukhi/grpc,ncteisen/grpc,sreecha/grpc,ncteisen/grpc,apolcyn/grpc,grani/grpc,malexzx/grpc,mehrdada/grpc,stanley-cheung/grpc,matt-kwong/grpc,bogdandrutu/grpc,andrewpollock/grpc,dgquintas/grpc,vsco/grpc,murgatroid99/grpc,podsvirov/grpc,thinkerou/grpc,nicolasnoble/grpc,makdharma/grpc,yongni/grpc,ncteisen/grpc,deepaklukose/grpc,yongni/grpc,nicolasnoble/grpc,vsco/grpc,dgquintas/grpc,royalharsh/grpc,muxi/grpc,jboeuf/grpc,sreecha/grpc,pszemus/grpc,ppietrasa/grpc,soltanmm/grpc,ppietrasa/grpc,grpc/grpc,jboeuf/grpc,royalharsh/grpc,jboeuf/grpc,msmania/grpc,yugui/grpc,perumaalgoog/grpc,arkmaxim/grpc,carl-mastrangelo/grpc,goldenbull/grpc,ejona86/grpc,jcanizales/grpc,andrewpollock/grpc,a-veitch/grpc,soltanmm-google/grpc,podsvirov/grpc,royalharsh/grpc,bogdandrutu/grpc,bogdandrutu/grpc,daniel-j-born/grpc,7anner/grpc,perumaalgoog/grpc,ejona86/grpc,vjpai/grpc,Crevil/grpc,royalharsh/grpc,makdharma/grpc,ppietrasa/grpc,pszemus/grpc,ipylypiv/grpc,jboeuf/grpc,makdharma/grpc,a-veitch/grpc,baylabs/grpc,nicolasnoble/grpc,philcleveland/grpc,carl-mastrangelo/grpc,a-veitch/grpc,daniel-j-born/grpc,thinkerou/grpc,yongni/grpc,leifurhauks/grpc,wcevans/grpc,ppietrasa/grpc,geffzhang/grpc,podsvirov/grpc,jcanizales/grpc,rjshade/grpc,daniel-j-born/grpc,a11r/grpc,kumaralokgithub/grpc,msmania/grpc,daniel-j-born/grpc,philcleveland/grpc,kpayson64/grpc,carl-mastrangelo/grpc,PeterFaiman/ruby-grpc-minimal,soltanmm/grpc,thinkerou/grpc,Vizerai/grpc,makdharma/grpc,a11r/grpc,chrisdunelm/grpc,stanley-cheung/grpc,sreecha/grpc,murgatroid99/grpc,philcleveland/grpc,podsvirov/grpc,ncteisen/grpc,dgquintas/grpc,donnadionne/grpc,Vizerai/grpc,apolcyn/grpc,ejona86/grpc,thunderboltsid/grpc,pszemus/grpc,stanley-cheung/grpc,yongni/grpc,donnadionne/grpc,muxi/grpc,nicolasnoble/grpc,a11r/grpc,fuchsia-mirror/third_party-grpc,jcanizales/grpc,malexzx/grpc,pszemus/grpc,donnadionne/grpc,PeterFaiman/ruby-grpc-minimal,leifurhauks/grpc,adelez/grpc,infinit/grpc,grani/grpc,dgquintas/grpc,a-veitch/grpc,ctiller/grpc,matt-kwong/grpc,sreecha/grpc,thinkerou/grpc,ncteisen/grpc,thunderboltsid/grpc,yugui/grpc,ejona86/grpc,rjshade/grpc,mehrdada/grpc,kumaralokgithub/grpc,malexzx/grpc,dklempner/grpc,greasypizza/grpc,sreecha/grpc,yugui/grpc,adelez/grpc,wcevans/grpc,simonkuang/grpc,nicolasnoble/grpc,dgquintas/grpc,ejona86/grpc,daniel-j-born/grpc,7anner/grpc,7anner/grpc,philcleveland/grpc,nicolasnoble/grpc,simonkuang/grpc,andrewpollock/grpc,matt-kwong/grpc,ipylypiv/grpc,dgquintas/grpc,Vizerai/grpc,stanley-cheung/grpc,royalharsh/grpc,adelez/grpc,Vizerai/grpc,matt-kwong/grpc,simonkuang/grpc,thinkerou/grpc,adelez/grpc,pmarks-net/grpc,firebase/grpc,Vizerai/grpc,a11r/grpc,simonkuang/grpc,firebase/grpc,ctiller/grpc,jtattermusch/grpc,thunderboltsid/grpc,kriswuollett/grpc,yugui/grpc,vjpai/grpc,jtattermusch/grpc,jtattermusch/grpc,yang-g/grpc