mysql: cleanup and update to 5.1.73

mysql: cleanup and update to 5.1.73

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- some mirrors do not have the old version anymore
- cleanup deprecated options

--without-vio : removed in 5.0.2
--without-raid, --without-mysqlfs : removed in 5.0.3
http://dev.mysql.com/doc/refman/5.0/en/source-configuration-options.html

--without-pstack : removed in 5.1.54
--without-bench : removed in 5.1.11
http://dev.mysql.com/doc/refman/5.1/en/source-configuration-options.html

Signed-off-by: Dirk Neukirchen <dirkneukirchen@web.de>
git-svn-id: svn://svn.openwrt.org/openwrt/packages@39488 3c298f89-4303-0410-b956-a3cf2f4a3e73