mnt: Extend comment about how mntinfo->mountpoint path looks like
mnt: Extend comment about how mntinfo->mountpoint path looks like

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

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