ports/147716: Switch default MySQL version from 5.0-EOL to 5.1-GA

[ale at FreeBSD.org]

Synopsis: Switch default MySQL version from 5.0-EOL to 5.1-GA

Responsible-Changed-From-To: freebsd-ports-bugs->portmgr
Responsible-Changed-By: ale
Responsible-Changed-When: Wed Jun 9 08:00:14 UTC 2010
Responsible-Changed-Why: 
Experimental build needed. I expect near to zero breakage. Target 8.1-RELEASE.

http://www.freebsd.org/cgi/query-pr.cgi?pr=147716