Update to 2.16.6.

• Only report "make makepatch" once per patch file [1]
• Attempt to re-word the make makepatch warning to avoid unnecessary repo churn [2]
• Attempt to test some other macros for sorting [3]
• Do not check empty dependencies for validity [4]

PR: 202050 [1]

		201647 [2]
		201409 [3]
		202052 [4]

Submitted by: gerald [1]