Move some functions from object_parse.c into hash.c. These functions either require hash.c code anyway or contain object ID implementation internals. Add a new file object_qid.c, for got_object_id_queue and got_object_qid. This new file must be linked to virtually every program.

It will soon grow functions to deal with sha256 too. stsp@ agrees.

Add missing srcs and update got_repo_read_gitconfig() to be consistent with recent changes. ok stsp@

This will be used by an upcoming regress test suite for gotd(8). ok tracey