Commit Briefs
store deltas in compressed form while packing, both in memory and cache file
This reduces memory and disk space consumption during packing. with tweaks + memleak on error fix from op@ ok op@
fix infinite loop in got-index-pack for pack files >= 4GB in size
Because of a missing range check our zlib wrapper would end up calling zlib over and over with zero bytes of input. Problem reported by semarie and naddy. Fixed with help from millert@. ok millert naddy
add checksum support to got_deflate_to_file()
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
got_error_from_errno -> got_error_prefix_errno
also add got_error_prefix_errno2 and got_error_prefix_errno3 which should hopefully all be merged into a single function with variadic args (but can't alloc mem)