v2.7.2
maint: update all copyright year number ranges
Add line number overflow checking
Buffer overflow on malicious input file
build: update gnulib submodule to latest
Don't try applying hunks at offsets that can't work
Fail when out of memory in set_hunkmax()
Move symlink_target_is_valid() and cwd_is_root()
Move all source and header files into src/