Remove mention of minimum password length and upper/lower case checking,
patch supplied by Allan Jude <freebsd@allanjude.com>.  Add xref to
pam_passwdqc(8), where that testing is now done.

PR:		docs/184482
Submitted by:	Ryan Gerstenkorn <ryan_gerstenkorn@fastmail.fm>
Reviewed by:	jilles, eadler
MFC after:	3 days