added plugin to control macports mysql-server installation

plugins/mysql-macports.plugin.zsh

@@ -0,0 +1,6 @@
+# commands to control local mysql-server installation
+# paths are for osx installtion via macports
+
+alias mysqlstart='sudo /opt/local/bin/mysqld_safe5'
+alias mysqlstop='/opt/local/bin/mysqladmin5 -u root -p shutdown'
+alias mysqlstatus='mysqladmin5 -u root -p ping'