support ROOTDEBUG environment variable, its value is used to set gDebug at startup and overrides the value in a rootrc file. Convenient to quickly turn on debug mode in TROOT startup.
support ROOTDEBUG environment variable, its value is used to set gDebug
at startup and overrides the value in a rootrc file. Convenient to quickly
turn on debug mode in TROOT startup.


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@7462 27541ba8-7e3a-0410-8455-c3a389f83636

zzxuanyuan/root,omazapa/root-old,veprbl/root,mhuwiler/rootauto,evgeny-boger/root,zzxuanyuan/root-compressor-dummy,abhinavmoudgil95/root,zzxuanyuan/root-compressor-dummy,tc3t/qoot,strykejern/TTreeReader,beniz/root,nilqed/root,ffurano/root5,sbinet/cxx-root,pspe/root,root-mirror/root,bbockelm/root,esakellari/root,BerserkerTroll/root,esakellari/root,zzxuanyuan/root-compressor-dummy,sbinet/cxx-root,nilqed/root,beniz/root,simonpf/root,Duraznos/root,0x0all/ROOT,sirinath/root,simonpf/root,Y--/root,jrtomps/root,omazapa/root-old,perovic/root,sirinath/root,strykejern/TTreeReader,kirbyherm/root-r-tools,davidlt/root,ffurano/root5,sbinet/cxx-root,omazapa/root,nilqed/root,vukasinmilosevic/root,mhuwiler/rootauto,gganis/root,satyarth934/root,root-mirror/root,CristinaCristescu/root,lgiommi/root,jrtomps/root,omazapa/root-old,tc3t/qoot,abhinavmoudgil95/root,zzxuanyuan/root,mkret2/root,georgtroska/root,BerserkerTroll/root,smarinac/root,alexschlueter/cern-root,Duraznos/root,CristinaCristescu/root,vukasinmilosevic/root,sbinet/cxx-root,veprbl/root,zzxuanyuan/root-compressor-dummy,Y--/root,alexschlueter/cern-root,vukasinmilosevic/root,buuck/root,arch1tect0r/root,evgeny-boger/root,pspe/root,tc3t/qoot,esakellari/my_root_for_test,satyarth934/root,zzxuanyuan/root,kirbyherm/root-r-tools,evgeny-boger/root,krafczyk/root,gbitzes/root,Y--/root,omazapa/root,simonpf/root,root-mirror/root,gganis/root,zzxuanyuan/root,thomaskeck/root,georgtroska/root,tc3t/qoot,beniz/root,smarinac/root,mkret2/root,dfunke/root,sawenzel/root,agarciamontoro/root,vukasinmilosevic/root,esakellari/my_root_for_test,agarciamontoro/root,esakellari/my_root_for_test,dfunke/root,beniz/root,simonpf/root,zzxuanyuan/root,zzxuanyuan/root,mhuwiler/rootauto,strykejern/TTreeReader,buuck/root,satyarth934/root,agarciamontoro/root,davidlt/root,veprbl/root,nilqed/root,arch1tect0r/root,gbitzes/root,evgeny-boger/root,arch1tect0r/root,veprbl/root,lgiommi/root,gganis/root,smarinac/root,agarciamontoro/root,CristinaCristescu/root,satyarth934/root,BerserkerTroll/root,karies/root,sirinath/root,vukasinmilosevic/root,arch1tect0r/root,esakellari/root,bbockelm/root,georgtroska/root,thomaskeck/root,mhuwiler/rootauto,strykejern/TTreeReader,agarciamontoro/root,Y--/root,nilqed/root,lgiommi/root,gbitzes/root,lgiommi/root,abhinavmoudgil95/root,dfunke/root,sirinath/root,bbockelm/root,mhuwiler/rootauto,buuck/root,davidlt/root,BerserkerTroll/root,kirbyherm/root-r-tools,ffurano/root5,smarinac/root,olifre/root,alexschlueter/cern-root,thomaskeck/root,esakellari/my_root_for_test,tc3t/qoot,root-mirror/root,tc3t/qoot,krafczyk/root,BerserkerTroll/root,sawenzel/root,Dr15Jones/root,bbockelm/root,veprbl/root,evgeny-boger/root,root-mirror/root,mattkretz/root,krafczyk/root,beniz/root,Duraznos/root,satyarth934/root,zzxuanyuan/root,Y--/root,abhinavmoudgil95/root,esakellari/root,mkret2/root,veprbl/root,Y--/root,cxx-hep/root-cern,nilqed/root,Duraznos/root,agarciamontoro/root,esakellari/root,thomaskeck/root,mkret2/root,sawenzel/root,gganis/root,BerserkerTroll/root,sawenzel/root,gbitzes/root,esakellari/my_root_for_test,omazapa/root-old,Dr15Jones/root,smarinac/root,0x0all/ROOT,thomaskeck/root,bbockelm/root,karies/root,dfunke/root,thomaskeck/root,perovic/root,sawenzel/root,dfunke/root,pspe/root,esakellari/root,cxx-hep/root-cern,mkret2/root,sbinet/cxx-root,abhinavmoudgil95/root,gbitzes/root,satyarth934/root,esakellari/my_root_for_test,agarciamontoro/root,kirbyherm/root-r-tools,beniz/root,pspe/root,thomaskeck/root,alexschlueter/cern-root,omazapa/root-old,davidlt/root,zzxuanyuan/root-compressor-dummy,olifre/root,perovic/root,dfunke/root,gbitzes/root,gganis/root,beniz/root,jrtomps/root,BerserkerTroll/root,buuck/root,strykejern/TTreeReader,pspe/root,esakellari/my_root_for_test,simonpf/root,zzxuanyuan/root,CristinaCristescu/root,esakellari/root,Duraznos/root,CristinaCristescu/root,omazapa/root,vukasinmilosevic/root,thomaskeck/root,root-mirror/root,perovic/root,evgeny-boger/root,gbitzes/root,vukasinmilosevic/root,bbockelm/root,karies/root,bbockelm/root,omazapa/root-old,satyarth934/root,veprbl/root,abhinavmoudgil95/root,Y--/root,krafczyk/root,agarciamontoro/root,evgeny-boger/root,omazapa/root-old,abhinavmoudgil95/root,esakellari/my_root_for_test,cxx-hep/root-cern,georgtroska/root,zzxuanyuan/root-compressor-dummy,esakellari/root,lgiommi/root,sbinet/cxx-root,mkret2/root,vukasinmilosevic/root,gganis/root,satyarth934/root,esakellari/root,Dr15Jones/root,abhinavmoudgil95/root,krafczyk/root,karies/root,sawenzel/root,buuck/root,0x0all/ROOT,olifre/root,vukasinmilosevic/root,simonpf/root,sbinet/cxx-root,beniz/root,pspe/root,bbockelm/root,georgtroska/root,esakellari/root,sbinet/cxx-root,gbitzes/root,sirinath/root,cxx-hep/root-cern,gganis/root,Duraznos/root,alexschlueter/cern-root,davidlt/root,sawenzel/root,tc3t/qoot,davidlt/root,perovic/root,CristinaCristescu/root,buuck/root,davidlt/root,beniz/root,sawenzel/root,satyarth934/root,krafczyk/root,davidlt/root,ffurano/root5,karies/root,CristinaCristescu/root,nilqed/root,strykejern/TTreeReader,karies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