Commit Briefs
add a dry-run/nop mode for got patch
with lots of help from stsp for the manpage bits!
check file status before applying the patch
Don't allow `got patch' to delete files that are not known, or add files that are already known and to edit files that are known, not obstructed and without conflicts.
refactor apply_patch to support renaming files
add two helper functions (schedule_add, schedule_del) and move the guts of apply_patch into a new function `patch_file'. This simplifies apply_patch and makes easier to figure out what happens. Then, drop GOT_ERR_PATCH_PATHS_DIFFER since we allow the to rename files.