osgeo4w: include PYTHONPATH in apache conf template

Author: jef-n

ms-windows/osgeo4w/httpd.conf.tmpl

@@ -4,6 +4,7 @@ DefaultInitEnv PATH "@osgeo4w@\bin;@osgeo4w@\apps\@package@\bin;@osgeo4w@\apps\g
 DefaultInitEnv QGIS_PREFIX_PATH "@osgeo4w@\apps\@package@"
 DefaultInitEnv QT_PLUGIN_PATH "@osgeo4w@\apps\@package@\qtplugins;@osgeo4w@\apps\qt4\plugins"
 DefaultInitEnv TEMP "@temp@"
+DefaultInitEnv PYTHONHOME "@osgeo4w@\apps\Python27"
 
 Alias /@package@/ @osgeo4w@/apps/@package@/bin/