use correct magic var in php entry scripts to hold script folder structure independent of call folder

fix php socket location in postinst script

deb/OpenMediaCenter/DEBIAN/postinst

@@ -3,7 +3,7 @@
 ln -sf /etc/nginx/sites-available/OpenMediaCenter.conf /etc/nginx/sites-enabled/OpenMediaCenter.conf
 
 # link general socket to current one
-phpsymlink="/var/run/php-fpm.sock";
+phpsymlink="/var/run/php/php-fpm.sock";
 
 # create a gneral symlink to the php socket if not already existing
 if [ -L ${phpsymlink} ] ; then