warnings about param.h and localopts.h

[utzoo!decvax!ucbvax!dist2]

	There are some words of warning which must be said about these
files.  Unfortunately, none of this was included in our distributed
documentation.

	o       Most of the options are turned on regardless of whether
		they are defined as 0 or 1.  To be turned off, an
		option should be commented out.

	o       UCB_CLIST depends on UCB_BUFOUT also being defined.
		This fact is hidden in a comment inside mch.s.

	o       There is no code for a value of UCB_NKB other than 1.
		Don't change this value to some other number.  It won't
		work.

	o       If UCB_BUFOUT and UCB_MOUNT are defined, NABUF (in
		param.h) must be at least (NMOUNT + 1) / 2.  If
		UCB_BUFOUT is defined but UCB_MOUNT is not defined,
		NABUF must be at least NMOUNT.


			Carl