• Add bsd.ocaml.mk to support OCaml packages [1]

• Move x11-wm/xfce4/bsd.xfce.mk to Mk/ [2]

• Refactoring of FETCH_CMD to allow parameters to be overridden separately from commands [3]

PR: 101029 [1], 108862 [2], 109966 [3]

Submitted by: Stanislav Sedov <ssedov at mbsd dot msk dot ru> [1],

		oliver [2], edwin [3], linimon [3]

Note: this patch also adds 108738 and 108739 which the previous commit
claimed were committed, but were not. These are comment-only changes.