config: don't use 'section "subsection"' internal form on config_set
config: don't use 'section "subsection"' internal form on config_set

This had been left over from a time when I believed what the git
documentation had to say about case-sensitivity. The rest of the code
doesn't recognize this form and we hadn't noticed because most tests
don't try to get a recently-set variable but free and reload the
configuration, causing the right format to be used.

t0xicCode/libgit2,sygool/libgit2,stewid/libgit2,raybrad/libit2,mingyaaaa/libgit2,magnus98/TEST,jeffhostetler/public_libgit2,spraints/libgit2,jamieleecool/ptest,claudelee/libgit2,yosefhackmon/libgit2,t0xicCode/libgit2,jflesch/libgit2-mariadb,kenprice/libgit2,mcanthony/libgit2,joshtriplett/libgit2,sygool/libgit2,since2014/libgit2,nokiddin/libgit2,nacho/libgit2,kissthink/libgit2,Corillian/libgit2,leoyanggit/libgit2,skabel/manguse,saurabhsuniljain/libgit2,mrksrm/Mingijura,Snazz2001/libgit2,MrHacky/libgit2,JIghtuse/libgit2,Corillian/libgit2,maxiaoqian/libgit2,jeffhostetler/public_libgit2,t0xicCode/libgit2,linquize/libgit2,ardumont/libgit2,maxiaoqian/libgit2,sim0629/libgit2,mhp/libgit2,mcanthony/libgit2,falqas/libgit2,kenprice/libgit2,magnus98/TEST,zodiac/libgit2.js,MrHacky/libgit2,claudelee/libgit2,jeffhostetler/public_libgit2,amyvmiwei/libgit2,rcorre/libgit2,jeffhostetler/public_libgit2,Corillian/libgit2,joshtriplett/libgit2,whoisj/libgit2,saurabhsuniljain/libgit2,iankronquist/libgit2,mhp/libgit2,joshtriplett/libgit2,magnus98/TEST,joshtriplett/libgit2,oaastest/libgit2,Snazz2001/libgit2,yongthecoder/libgit2,iankronquist/libgit2,mhp/libgit2,jamieleecool/ptest,kissthink/libgit2,evhan/libgit2,dleehr/libgit2,sygool/libgit2,maxiaoqian/libgit2,jflesch/libgit2-mariadb,t0xicCode/libgit2,claudelee/libgit2,nokiddin/libgit2,stewid/libgit2,yosefhackmon/libgit2,stewid/libgit2,Aorjoa/libgit2_maked_lib,leoyanggit/libgit2,yosefhackmon/libgit2,spraints/libgit2,kenprice/libgit2,kenprice/libgit2,zodiac/libgit2.js,amyvmiwei/libgit2,mhp/libgit2,jeffhostetler/public_libgit2,since2014/libgit2,Tousiph/Demo1,mingyaaaa/libgit2,since2014/libgit2,Snazz2001/libgit2,rcorre/libgit2,KTXSoftware/libgit2,swisspol/DEMO-libgit2,leoyanggit/libgit2,sygool/libgit2,maxiaoqian/libgit2,MrHacky/libgit2,oaastest/libgit2,MrHacky/libgit2,sygool/libgit2,yongthecoder/libgit2,sim0629/libgit2,Corillian/libgit2,mingyaaaa/libgit2,dleehr/libgit2,claudelee/libgit2,chiayolin/libgit2,kenprice/libgit2,jflesch/libgit2-mariadb,mhp/libgit2,skabel/manguse,claudelee/libgit2,Corillian/libgit2,saurabhsuniljain/libgit2,mcanthony/libgit2,leoyanggit/libgit2,linquize/libgit2,Snazz2001/libgit2,zodiac/libgit2.js,evhan/libgit2,mcanthony/libgit2,whoisj/libgit2,Snazz2001/libgit2,since2014/libgit2,skabel/manguse,nacho/libgit2,whoisj/libgit2,Aorjoa/libgit2_maked_lib,mingyaaaa/libgit2,oaastest/libgit2,sim0629/libgit2,spraints/libgit2,iankronquist/libgit2,swisspol/DEMO-libgit2,Tousiph/Demo1,rcorre/libgit2,jflesch/libgit2-mariadb,mrksrm/Mingijura,Aorjoa/libgit2_maked_lib,yongthecoder/libgit2,zodiac/libgit2.js,kissthink/libgit2,mrksrm/Mingijura,falqas/libgit2,spraints/libgit2,swisspol/DEMO-libgit2,oaastest/libgit2,raybrad/libit2,saurabhsuniljain/libgit2,raybrad/libit2,joshtriplett/libgit2,ardumont/libgit2,sim0629/libgit2,magnus98/TEST,amyvmiwei/libgit2,Tousiph/Demo1,dleehr/libgit2,oaastest/libgit2,mrksrm/Mingijura,MrHacky/libgit2,MrHacky/libgit2,raybrad/libit2,mingyaaaa/libgit2,KTXSoftware/libgit2,linquize/libgit2,jflesch/libgit2-mariadb,whoisj/libgit2,yosefhackmon/libgit2,kissthink/libgit2,dleehr/libgit2,zodiac/libgit2.js,chiayolin/libgit2,chiayolin/libgit2,chiayolin/libgit2,sim0629/libgit2,mcanthony/libgit2,KTXSoftware/libgit2,Corillian/libgit2,stewid/libgit2,iankronquist/libgit2,amyvmiwei/libgit2,amyvmiwei/libgit2,yongthecoder/libgit2,mcanthony/libgit2,skabel/manguse,ardumont/libgit2,claudelee/libgit2,whoisj/libgit2,nacho/libgit2,kissthink/libgit2,dleehr/libgit2,yongthecoder/libgit2,KTXSoftware/libgit2,JIghtuse/libgit2,magnus98/TEST,joshtriplett/libgit2,sygool/libgit2,maxiaoqian/libgit2,yongthecoder/libgit2,nacho/libgit2,nokiddin/libgit2,JIghtuse/libgit2,spraints/libgit2,jeffhostetler/public_libgit2,since2014/libgit2,swisspol/DEMO-libgit2,stewid/libgit2,KTXSoftware/libgit2,t0xicCode/libgit2,ardumont/libgit2,chiayolin/libgit2,kissthink/libgit2,chiayolin/libgit2,saurabhsuniljain/libgit2,leoyanggit/libgit2,rcorre/libgit2,swisspol/DEMO-libgit2,amyvmiwei/libgit2,mrksrm/Mingijura,yosefhackmon/libgit2,raybrad/libit2,whoisj/libgit2,JIghtuse/libgit2,t0xicCode/libgit2,nokiddin/libgit2,Tousiph/Demo1,skabel/manguse,rcorre/libgit2,skabel/manguse,stewid/libgit2,rcorre/libgit2,swisspol/DEMO-libgit2,evhan/libgit2,mrksrm/Mingijura,jamieleecool/ptest,kenprice/libgit2,oaastest/libgit2,iankronquist/libgit2,falqas/libgit2,ardumont/libgit2,JIghtuse/libgit2,Snazz2001/libgit2,sim0629/libgit2,ardumont/libgit2,dleehr/libgit2,Tousiph/Demo1,leoyanggit/libgit2,mingyaaaa/libgit2,nokiddin/libgit2,linquize/libgit2,linquize/libgit2,linquize/libgit2,maxiaoqian/libgit2,Tousiph/Demo1,yosefhackmon/libgit2,spraints/libgit2,evhan/libgit2,Aorjoa/libgit2_maked_lib,jflesch/libgit2-mariadb,falqas/libgit2,iankronquist/libgit2,falqas/libgit2,saurabhsuniljain/libgit2,since2014/libgit2,mhp/libgit2,falqas/libgit2,KTXSoftware/libgit2,Aorjoa/libgit2_maked_lib,magnus98/TEST,jamieleecool/ptest,nokiddin/libgit2,JIghtuse/libgit2