standards/83845: [libm] [patch] add log2() and log2f() support for libm

[das at FreeBSD.org]

Synopsis: [libm] [patch] add log2() and log2f() support for libm

Responsible-Changed-From-To: freebsd-standards->das
Responsible-Changed-By: das
Responsible-Changed-When: Fri Dec 3 00:08:58 UTC 2010
Responsible-Changed-Why: 
Over to me. There have been numerous requests for this functionality.

http://www.freebsd.org/cgi/query-pr.cgi?pr=83845