Swap out using a while read loop for using maplines in __check_all_deps.
Swap out using a while read loop for using maplines in __check_all_deps.

For whatever reason, the while read loop awas leaking file descriptors
like crazy, and the mapfile based code does not.

aspiers/crowbar,toabctl/crowbar,nkrinner/crowbar,vwallfahrer/crowbar,rhafer/crowbar,SUSE-Cloud/crowbar,toabctl/crowbar,rsalevsky/crowbar,aplanas/crowbar,mmnelemane/crowbar,tserong/crowbar,rhafer/crowbar,dirkmueller/crowbar,tserong/crowbar,dirkmueller/crowbar,MaximilianMeister/crowbar,aplanas/crowbar,nkrinner/crowbar,MaximilianMeister/crowbar,crowbar/crowbar,aspiers/crowbar,mmnelemane/crowbar,rsalevsky/crowbar,vwallfahrer/crowbar,rhafer/crowbar,SUSE-Cloud/crowbar,crowbar/crowbar