fd: Split fd opening and serving out routines
fd: Split fd opening and serving out routines

Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@parallels.com>

marcosnils/criu,ldu4/criu,sdgdsffdsfff/criu,svloyso/criu,kawamuray/criu,gablg1/criu,LK4D4/criu,svloyso/criu,marcosnils/criu,AuthenticEshkinKot/criu,gablg1/criu,marcosnils/criu,LK4D4/criu,svloyso/criu,eabatalov/criu,tych0/criu,kawamuray/criu,rentzsch/criu,ldu4/criu,kawamuray/criu,tych0/criu,rentzsch/criu,kawamuray/criu,wtf42/criu,eabatalov/criu,rentzsch/criu,gonkulator/criu,KKoukiou/criu-remote,wtf42/criu,eabatalov/criu,biddyweb/criu,tych0/criu,fbocharov/criu,rentzsch/criu,svloyso/criu,marcosnils/criu,gablg1/criu,efiop/criu,KKoukiou/criu-remote,svloyso/criu,fbocharov/criu,sdgdsffdsfff/criu,KKoukiou/criu-remote,kawamuray/criu,KKoukiou/criu-remote,gonkulator/criu,gablg1/criu,ldu4/criu,eabatalov/criu,LK4D4/criu,gonkulator/criu,wtf42/criu,sdgdsffdsfff/criu,KKoukiou/criu-remote,gonkulator/criu,svloyso/criu,rentzsch/criu,ldu4/criu,biddyweb/criu,eabatalov/criu,eabatalov/criu,AuthenticEshkinKot/criu,ldu4/criu,LK4D4/criu,gonkulator/criu,fbocharov/criu,biddyweb/criu,sdgdsffdsfff/criu,gablg1/criu,efiop/criu,wtf42/criu,gonkulator/criu,marcosnils/criu,AuthenticEshkinKot/criu,sdgdsffdsfff/criu,tych0/criu,efiop/criu,AuthenticEshkinKot/criu,fbocharov/criu,efiop/criu,KKoukiou/criu-remote,LK4D4/criu,fbocharov/criu,kawamuray/criu,biddyweb/criu,ldu4/criu,biddyweb/criu,efiop/criu,AuthenticEshkinKot/criu,wtf42/criu,rentzsch/criu,fbocharov/criu,tych0/criu,sdgdsffdsfff/criu,AuthenticEshkinKot/criu,marcosnils/criu,LK4D4/criu,biddyweb/criu,wtf42/criu,tych0/criu,efiop/criu,gablg1/criu