stuff to get `got log -p' working

rename sha1.c to hash.c

include sha2.h where sha1.h was included

sed -i s/sha1/hash not exactly, some "hash" were changed back to "sha1" for the time being.

typo in comment it serializes the struct got_imsg_tree_entry, not tree_object. grep aid.

got_imsg_commit_object: use struct instead of buffer for id ok stsp@

got_imsg_object: use struct instead of buffer for id ok stsp@

got_imsg_send_remote_ref: use struct instead of buffer for id ok stsp@

got_imsg_send_ref: use struct instead of buffer for id ok stsp@

got_imsg_fetch_ref: use struct instead of buffer for id ok stsp@

got_imsg_fetch_have_ref: use struct instead of buffer for id ok stsp@

got_imsg_raw_delta: use struct instead of buffer for id ok stsp@

got_imsg_raw_delta_request: use struct instead of buffer for id ok stsp@

fmt

got_imsg_packed_object: use struct instead of buffer for id ok stsp@