Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
Renumber clauses to reduce diffs to other versionsNetBSD, OpenBSD, and Android's Bionic number the clauses 1 through 3,so follow suit to make comparison easier.
Fix style.
Per Regents of the University of Calfornia letter, remove advertisingclause.# If I've done so improperly on a file, please let me know.
Translate from GNU C to ISO C.
Add and document ffsl(), fls() and flsl().