[doc] add comments on sample api conf
[doc] add comments on sample api conf

yvesago/mig,deathping1994/mig,rayyang2000/mig,deathping1994/mig,zerosign/mig,ameihm0912/mig,rayyang2000/mig,djmitche/mig,djmitche/mig,datachand/mig,mozilla/mig,deathping1994/mig,yvesago/mig,datachand/mig,gdestuynder/mig,vladimirdiaconescu/mig,yvesago/mig,sunnygkp10/mig,therealkbhat/mig,datachand/mig,jvehent/mig,ameihm0912/mig,mvanotti/mig,pap/mig,zerosign/mig,jvehent/mig,rezen/mig,zerosign/mig,therealkbhat/mig,gdestuynder/mig,gdestuynder/mig,deathping1994/mig,mozilla/mig,pap/mig,pap/mig,sunnygkp10/mig,mozilla/mig,therealkbhat/mig,mvanotti/mig,zerosign/mig,sunnygkp10/mig,vladimirdiaconescu/mig,mozilla/mig,jboyer2012/mig,rayyang2000/mig,jvehent/mig,mvanotti/mig,mvanotti/mig,gdestuynder/mig,rayyang2000/mig,jvehent/mig,jboyer2012/mig,rezen/mig,sunnygkp10/mig,ameihm0912/mig,vladimirdiaconescu/mig,therealkbhat/mig,mozilla/mig,pap/mig,yvesago/mig,jboyer2012/mig,rezen/mig,vladimirdiaconescu/mig,rezen/mig,jboyer2012/mig,datachand/mig