Add more relnotes items for 8.2R:

Add more relnotes items for 8.2R:
	GENERIC now has KDB and KDB_TRACE by default,
	vfs.ncsizefactor and vfs.ncnegfactor added,
	opencrypto XTS-AES support,
	axe(4) TX packet rate improvement,
	rl(4) TX packet rate under high RX load improvement,
	gconcat(8) kernel crash dump support,
	geli(8) metadata version bump to 4,
	geli(8) kern.geom.eli.overwrites added,
	geli(8) key shift added,
	geli(8) XTS-AES support and enabled by default,
	geli(8) kern.geom.eli.debug=-1 support,
	geli(8) resize command added,
	geli(8) suspend/resume command added,
	geli(8) -f option added,
	geli(8) -J and -j options added,
	lpr(1) issue of files on ZFS fixed,
	watchdogd(8) MADV_PROTECTified, and
	ee(1) updated to 1.5.2.

Approved by:	re (implicit)

git-svn-id: svn://svn.freebsd.org/base/releng/8.2@218447 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f