Pull up following revision(s) (requested by hannken in ticket #772):

sys/miscfs/procfs/procfs_subr.c: revision 1.112

Change procfs_revoke_vnodes() to use vrecycle()/vgone() instead
of VOP_REVOKE().

Gets rid of a bunch of suspensions on /proc as vrecycle() will
succeed most time and we suspend at most once per call.

(martin)