serf: added comments on undocumented functions
serf: added comments on undocumented functions

patrickviet/serf,mbrukman/serf,mbrukman/serf,mapuri/serf,mapuri/serf,samaitra/serf,FollowMyDev/serf,dalehamel/serf,FollowMyDev/serf,curtiszimmerman/serf,pmenglund/serf,minhkiller/serf,minhkiller/serf,FollowMyDev/serf,jmptrader/serf,gnawhleinad/serf,FollowMyDev/serf,samaitra/serf,gnawhleinad/serf,hashicorp/serf,curtiszimmerman/serf,dalehamel/serf,pmenglund/serf,minhkiller/serf,samaitra/serf,curtiszimmerman/serf,pmenglund/serf,FollowMyDev/serf,gnawhleinad/serf,pmenglund/serf,hashicorp/serf,jmptrader/serf,yonglehou/serf,samaitra/serf,samaitra/serf,yonglehou/serf,mbrukman/serf,mapuri/serf,mapuri/serf,jmptrader/serf,hashicorp/serf,minhkiller/serf,minhkiller/serf,mbrukman/serf,hashicorp/serf,curtiszimmerman/serf,patrickviet/serf,patrickviet/serf,minhkiller/serf,patrickviet/serf,gnawhleinad/serf,dalehamel/serf,jmptrader/serf,yonglehou/serf,gnawhleinad/serf,yonglehou/serf,jmptrader/serf,mapuri/serf,mbrukman/serf,hashicorp/serf,pmenglund/serf,patrickviet/serf,dalehamel/serf,gnawhleinad/serf,mbrukman/serf,patrickviet/serf,mapuri/serf,yonglehou/serf,curtiszimmerman/serf,yonglehou/serf,dalehamel/serf,FollowMyDev/serf,curtiszimmerman/serf,pmenglund/serf,jmptrader/serf,samaitra/serf,dalehamel/serf