RPZ2 patch for 9.9.4-release -- can I use the -rc1 patch?

[jen142 at promessage.com]

Hi,

I'm looking to upgrade a bind 9.9.3 server to 9.9.4.  The 9.9.3 server
was built from src patched with "rpz2+rl-9.9.3-P2.patch" @

	"Multiple Zone Response Policy Zone (RPZ2) Speed Improvement
	with Response Rate Limiting (RRL)"
	 http://ss.vix.su/~vjs/rrlrpz.html

>From another thread, I understand:

	(a) RRL is now in/native to bind 9.9.4 source
	(b) RPZ is in 9.9.4 source, but it's still different from the
	RPZ2 changes provided the patches above

I need to maintain the current server's RPZ2 functionality in 9.9.4. 

Looking, there's no patch there for the 9.9.4 release.

There IS a 9.9.4-rc1 patch.

Can/should I apply the 9.9.4-rc1 patch to 9.9.4-release sources? or do I
need to wait for a new version patch?

I asked in #irc -- they suggested I bring this question back here.

Jen