This will eventually be used by 'gotadmin pack'. Checksum init and finalization will need to be done by the caller since many objects will be written out in compressed form while we are computing checksums across the entire pack file. ok millert, naddy

Code which inserts a reference into a reflist passes ownership of this reference to the list. However, got_ref_list_free() never closed such references, which resulted in a memory leak. ok tracey

Avoids an error where tog(1) would exit with "poll: Interrupted system call" while the terminal window was being resized. ok millert

Patch by Nam Nguyen

one of these tests is still failing; there is another edge case left to fix

problem found by jrick ok millert