Commit Briefs
rename lib/sha1.c to lib/hash.c
It will soon grow functions to deal with sha256 too. stsp@ agrees.
fix building of few regress
after got_object_id_hex was introduced and used in error.c, the building of delta, deltify and path failed due to missing symbols. Spotted by stsp and tracey, ok stsp
add a -q option to tests for quiet output and use it for 'make regress'
Previous default output remains when test cases are run individually. ok tracey