ports/168505: [bsd.port.mk] OPTIONSNG: Make SINGLE be 0 or 1, not 1-and-only-1

[bapt at FreeBSD.org]

Synopsis: [bsd.port.mk] OPTIONSNG: Make SINGLE be 0 or 1, not 1-and-only-1

Responsible-Changed-From-To: freebsd-ports-bugs->bapt
Responsible-Changed-By: bapt
Responsible-Changed-When: Thu May 31 19:04:34 UTC 2012
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=168505