http: small adjustment of THttpServer for fastcgi
http: small adjustment of THttpServer for fastcgi

When used with fastcgi, server has additional prefix in url address
like http://apache_server.local/root.app. Therefore reference to
jsrootsys/ or rootsys/ directory should be relative and not
absolute as before (not /jsrootsys)

Signed-off-by: Bertrand Bellenot <6715f273cb2881a3bfbd56f899a7173358fb0b89@cern.ch>

perovic/root,root-mirror/root,sbinet/cxx-root,krafczyk/root,karies/root,Duraznos/root,thomaskeck/root,gbitzes/root,root-mirror/root,omazapa/root,nilqed/root,beniz/root,esakellari/root,zzxuanyuan/root-compressor-dummy,dfunke/root,simonpf/root,nilqed/root,mattkretz/root,sbinet/cxx-root,sbinet/cxx-root,georgtroska/root,olifre/root,pspe/root,dfunke/root,jrtomps/root,esakellari/root,Y--/root,beniz/root,mkret2/root,Duraznos/root,esakellari/root,mattkretz/root,georgtroska/root,evgeny-boger/root,BerserkerTroll/root,sbinet/cxx-root,lgiommi/root,gganis/root,CristinaCristescu/root,pspe/root,arch1tect0r/root,abhinavmoudgil95/root,mhuwiler/rootauto,abhinavmoudgil95/root,krafczyk/root,karies/root,evgeny-boger/root,gganis/root,gganis/root,agarciamontoro/root,beniz/root,sirinath/root,nilqed/root,Duraznos/root,dfunke/root,gganis/root,buuck/root,omazapa/root,mhuwiler/rootauto,gganis/root,simonpf/root,BerserkerTroll/root,agarciamontoro/root,mhuwiler/rootauto,sirinath/root,buuck/root,beniz/root,evgeny-boger/root,pspe/root,mhuwiler/rootauto,dfunke/root,sirinath/root,dfunke/root,jrtomps/root,thomaskeck/root,zzxuanyuan/root-compressor-dummy,vukasinmilosevic/root,sirinath/root,root-mirror/root,esakellari/root,simonpf/root,sbinet/cxx-root,nilqed/root,omazapa/root,veprbl/root,abhinavmoudgil95/root,zzxuanyuan/root-compressor-dummy,simonpf/root,Y--/root,sawenzel/root,perovic/root,buuck/root,root-mirror/root,vukasinmilosevic/root,bbockelm/root,bbockelm/root,perovic/root,satyarth934/root,jrtomps/root,simonpf/root,veprbl/root,root-mirror/root,krafczyk/root,CristinaCristescu/root,abhinavmoudgil95/root,zzxuanyuan/root,zzxuanyuan/root,gganis/root,abhinavmoudgil95/root,Y--/root,georgtroska/root,BerserkerTroll/root,zzxuanyuan/root-compressor-dummy,BerserkerTroll/root,nilqed/root,Y--/root,sirinath/root,olifre/root,olifre/root,olifre/root,mkret2/root,CristinaCristescu/root,sirinath/root,sbinet/cxx-root,esakellari/root,BerserkerTroll/root,pspe/root,zzxuanyuan/root,zzxuanyuan/root,evgeny-boger/root,karies/root,gbitzes/root,georgtroska/root,BerserkerTroll/root,davidlt/root,omazapa/root,vukasinmilosevic/root,beniz/root,agarciamontoro/root,krafczyk/root,Duraznos/root,mkret2/root,mhuwiler/rootauto,beniz/root,veprbl/root,davidlt/root,abhinavmoudgil95/root,sawenzel/root,sawenzel/root,karies/root,georgtroska/root,karies/root,arch1tect0r/root,bbockelm/root,sawenzel/root,vukasinmilosevic/root,karies/root,beniz/root,vukasinmilosevic/root,thomaskeck/root,georgtroska/root,arch1tect0r/root,esakellari/root,agarciamontoro/root,gganis/root,arch1tect0r/root,mhuwiler/rootauto,perovic/root,sawenzel/root,mkret2/root,satyarth934/root,buuck/root,vukasinmilosevic/root,simonpf/root,krafczyk/root,arch1tect0r/root,abhinavmoudgil95/root,bbockelm/root,zzxuanyuan/root,zzxuanyuan/root,agarciamontoro/root,evgeny-boger/root,root-mirror/root,evgeny-boger/root,veprbl/root,vukasinmilosevic/root,arch1tect0r/root,sawenzel/root,gganis/root,davidlt/root,georgtroska/root,CristinaCristescu/root,davidlt/root,CristinaCristescu/root,vukasinmilosevic/root,thomaskeck/root,krafczyk/root,karies/root,zzxuanyuan/root,agarciamontoro/root,karies/root,mattkretz/root,thomaskeck/root,zzxuanyuan/root-compressor-dummy,mattkretz/root,pspe/root,mattkretz/root,agarciamontoro/root,Y--/root,evgeny-boger/root,arch1tect0r/root,simonpf/root,nilqed/root,BerserkerTroll/root,zzxuanyuan/root-compressor-dummy,olifre/root,karies/root,nilqed/root,veprbl/root,nilqed/root,olifre/root,CristinaCristescu/root,omazapa/root,beniz/root,sirinath/root,mattkretz/root,mkret2/root,esakellari/root,CristinaCristescu/root,lgiommi/root,abhinavmoudgil95/root,gbitzes/root,thomaskeck/root,Duraznos/root,mattkretz/root,omazapa/root,sirinath/root,arch1tect0r/root,karies/root,sbinet/cxx-root,olifre/root,krafczyk/root,Y--/root,jrtomps/root,nilqed/root,simonpf/root,mkret2/root,veprbl/root,lgiommi/root,gbitzes/root,thomaskeck/root,zzxuanyuan/root,lgiommi/root,davidlt/root,arch1tect0r/root,esakellari/root,zzxuanyuan/root-compressor-dummy,BerserkerTroll/root,veprbl/root,abhinavmoudgil95/root,pspe/root,perovic/root,jrtomps/root,zzxuanyuan/root,root-mirror/root,dfunke/root,omazapa/root,buuck/root,Y--/root,sirinath/root,gganis/root,olifre/root,evgeny-boger/root,Duraznos/root,Duraznos/root,CristinaCristescu/root,veprbl/root,perovic/root,thomaskeck/root,bbockelm/root,Duraznos/root,krafczyk/root,georgtroska/root,esakellari/root,omazapa/root,sawenzel/root,perovic/root,sawenzel/root,davidlt/root,gbitzes/root,pspe/root,esakellari/root,buuck/root,dfunke/root,vukasinmilosevic/root,mkret2/root,mattkretz/root,mhuwiler/rootauto,mhuwiler/rootauto,abhinavmoudgil95/root,lgiommi/root,zzxuanyuan/root-compressor-dummy,thomaskeck/root,zzxuanyuan/root,sirinath/root,mhuwiler/rootauto,georgtroska/root,lgiommi/root,davidlt/root,mattkretz/root,CristinaCristescu/root,mkret2/root,sawenzel/root,gbitzes/root,gganis/root,pspe/root,gbitzes/root,jrtomps/root,georgtroska/root,krafczyk/root,root-mirror/root,bbockelm/root,arch1tect0r/root,mkret2/root,omazapa/root,satyarth934/root,lgiommi/root,krafczyk/root,karies/root,pspe/root,Y--/root,jrtomps/root,root-mirror/root,jrtomps/root,beniz/root,abhinavmoudgil95/root,dfunke/root,vukasinmilosevic/root,agarciamontoro/root,beniz/root,Duraznos/root,davidlt/root,CristinaCristescu/root,simonpf/root,bbockelm/root,dfunke/root,veprbl/root,olifre/root,mattkretz/root,Duraznos/root,davidlt/root,pspe/root,root-mirror/root,mattkretz/root,beniz/root,satyarth934/root,gbitzes/root,esakellari/root,omazapa/root,satyarth934/root,sawenzel/root,evgeny-boger/root,zzxuanyuan/root,sbinet/cxx-root,lgiommi/root,veprbl/root,georgtroska/root,zzxuanyuan/root-compressor-dummy,evgeny-boger/root,simonpf/root,zzxuanyuan/root-compressor-dummy,bbockelm/root,Y--/root,lgiommi/root,satyarth934/root,jrtomps/root,omazapa/root,mkret2/root,mkret2/root,buuck/root,BerserkerTroll/root,satyarth934/root,lgiommi/root,gbitzes/root,agarciamontoro/root,sawenzel/root,sbinet/cxx-root,simonpf/root,thomaskeck/root,buuck/root,zzxuanyuan/root-compressor-dummy,olifre/root,zzxuanyuan/root,perovic/root,sirinath/root,satyarth934/root,sbinet/cxx-root,dfunke/root,perovic/root,nilqed/root,evgeny-boger/root,krafczyk/root,dfunke/root,BerserkerTroll/root,arch1tect0r/root,BerserkerTroll/root,sbinet/cxx-root,nilqed/root,buuck/root,davidlt/root,bbockelm/root,satyarth934/root,CristinaCristescu/root,buuck/root,lgiommi/root,gbitzes/root,agarciamontoro/root,perovic/root,Duraznos/root,mhuwiler/rootauto,bbockelm/root,pspe/root,agarciamontoro/root,buuck/root,veprbl/root,satyarth934/root,gbitzes/root,jrtomps/root,gganis/root,Y--/root,root-mirror/root,jrtomps/root,perovic/root,vukasinmilosevic/root,bbockelm/root,satyarth934/root,davidlt/root,Y--/root,mhuwiler/rootauto,olifre/root