I just looked at the kernel source, and the crcmp() function has not yet 
disappeared, although I think it should. These are the reasons:

   - It is unclear why it is necessary at all.
     http://mail-index.netbsd.org/tech-kern/2005/11/04/0005.html

   - It is only used in one place:
     src/sys/kern/vfs/nfs_export.c

   - It is the only reason for sorting group lists
     when they enter the kernel via setgroups(),
     which itself is considered unwanted.
     http://mail-index.netbsd.org/tech-kern/2005/11/03/0021.html

   - Removing it would make grsortu() superfluous.
     src/sys/kern/kern_prot.c

   - It has a big FIXME comment.
     src/sys/kern/kern_prot.c

If any of these statements are wrong, please correct me.

If anyone can tell me why this function is necessary, even better. 
Please do so.

Roland