ignore-non-existing-directory: add variant of ignore-non-existing

[robbat2]

Add new option --ignore-non-existing-directory, that is a variant of --ignore-non-existing, but applies ONLY to directories.

This was previously proposed in bug #8366, but I independently had a use case for it in the Gentoo infrastructure.

Reference: https://bugzilla.samba.org/show_bug.cgi?id=8366 Reference: http://superuser.com/questions/316561/rsync-synchronizing-files-only-without-creating-folders-on-destination Reference: https://github.com/RsyncProject/rsync-patches/issues/8 Reference: https://lists.samba.org/archive/rsync/2015-November/030455.html

[robbat2]

@tridge another PR for merge please?

[ToastMaster1014]

Ignore bitch I will redirect you again

[ToastMaster1014]

@tridge another PR for merge please?

No sorry can't do that.