Throwing this into the mix for a while, we can always get rid of it again if it becomes annoying. No objections from stsp@

suggested by millert ok thomas_adam

This fixes an issue where some references were missing from lists of references sorted by timestamp.

Cache commit timestamps in struct got_reference in case we are sorting references by commit timestamp. This avoids opening and closing commits every time we compare two references with each other. ok thomas.adam

ok stsp

This will be needed for a future 'got send' command.

This will be needed by a future 'got send' command.

This will be needed by 'gotadmin pack'.

This catches invalid reference names passed to 'got ref -l' and will also be needed to validate reference names passed to a future 'gotadmin pack' command. ok 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

Create automatic "backup" references which ensure that objects from the pre-rebase or pre-histedit state remain in the repository. A new -l option for 'got rebase' and 'got histedit' lists old commits. This makes it easier to recover from botched rebase or histedit operations. Removal of such objects currently requires got ref -d and git-gc. This will be made more convenient in the future. testing and ok jrick

ok millert, naddy

ok stsp

Fixes display of "/tags/..." commit ID decorators in tog which was broken in previous commits.