INSTALL.TXT, ADDITIONS/squirrelmail-plugin/INSTALL
- add required version of Zend Framework (1.12.x) and a warning that 2.x
  won't work (reported by seboulba on IRC)



git-svn-id: svn://svn.code.sf.net/p/postfixadmin/code@1699 a1433add-5e2c-0410-b055-b7f2511e0802