Release pkg 1.12.0

• updating: allow to use regular expession in AFFECTS: value
• updating: improve the exact matching for AFFECTS: values
• recommand using pkg bootstrap -f instead of pkg-static install -f to reinstall pkg itself
• Add support for lua in package scripts (not documented yet)
• Add support for lua in keywords definition (not documented yet)
• Properly detect when base libarchive is linked to zstd and handle it. (needed an upcoming change in base)
• Add a function tu lua script to append message at the run of the pkg process along with other messages
• Add the missing warning about @unexec being deprecated for a while now in pkg-plist
• Fix build with gmake
• Ensure pkg_shutdown properly reinitialize all the closed fd to -1.
• Do not crash when being passed an unsupported ABI