Folks:
	I just tripped over some build lossage which appears to be due to
	the addition of opencrypto (well, at least the config glue) to the
	tree.

	Here's what happened:
		* Not having updated since ~ the end of September, I
		  did a 'build.sh tools kernel' to update tools and
		  build a new kernel for my x86 desktop box.  I used
		  the same config file as always, which produced the
		  currently-running kernel (1.6ZC).
		* The kernel failed to link due to missing cast128
		  symbols; investigation shows that the cast source
		  files were simply not emitted into the Makefile 
		  by config(8) [actually by the TOOLDIR's nbconfig].
		* Further attempts at re-running both the installed
		  config(8) and the TOOLDIR nbconfig lead to Makefiles
		  which were sometimes missing the DES sources, the
		  Blowfish sources (or again, the CAST128 sources), or
		  the Rijndael sources.

	My suspicion was on the OpenCrypto changes, since that was the
	last major thing that should have touched the crypto code.  On
	a hunch, removing the inclusion of 'files.opencrypto' from sys/
	conf/files actually led to a kernel compile which included all
	the crypto algorithm code (it didn't build since now there was
	no 'opencrypto.h', but creating an empty opencrypto.h made it
	go and build succesfully).

	The culprit appears to be the clash of crypto attributes in
	files.opencrypto vs. files.ipsec (I'm running without open-
	crypto or fast-ipsec, but with IPSEC, IPSEC_ESP and IPSEC_
	DEBUG)... I haven't done much more digging but figured I'd
	report it here before someone else lost some hair.  I'll file
	a PR if nobody has fixed this already (or convinces me that
	the lossage is specific to me).

Thanks!
--rafal

----
Rafal Boni                                                     rafal@pobox.com
  We are all worms.  But I do believe I am a glowworm.  -- Winston Churchill