Grammar tweaks for locking.9

Reviewed by:	jhb
Approved by:	hrs (mentor)
In generic_bs_map(), use kmem_alloc_nofault() instead of kmem_alloc(), as we
only need virtual addresses.

Submitted by:	alc
Decrypt magic numbers - define names for fields of Generic Timer's CNTKCTL reg.

Submitted by:	Ruslan Bukin <br@bsdpad.com>
Add "ether" and "link" to ifconfig_alias{es,N}.
Replace some spaces to tab.