rsync does not preserve hard links and does not provide other_options

[pva]

Hi. COMPRESS_DEFINITIONS does not allow rsync to have other_options. Still, it uses only -a option that loses acls, xattrs, and hard-links during copy:

       --archive, -a            archive mode is -rlptgoD (no -A,-X,-U,-N,-H)

       --acls, -A               preserve ACLs (implies --perms)
       --xattrs, -X             preserve extended attributes
       --atimes, -U             preserve access (use) times
       --crtimes, -N            preserve create times (newness)
       --hard-links, -H         preserve hard links

For example, missing hard-links increase the size of directories more than 20x:

22M	/var/tmp/catalyst/tmp/hardened/livecd-stage1-core2-hardened-nomultilib-openrc-2023.03.04/usr/libexec/git-core/
502M	/var/tmp/catalyst/tmp/hardened/livecd-stage2-core2-hardened-nomultilib-openrc-2023.03.04/usr/libexec/git-core/

I'm looking for best solution here. Probably easiest solution will be to add H, A, and X options for rsync. Will you accept such change? Or should we add other_options for args definition, to allow catalyst check and set additional options and set these options there?