Enable SysV symlinks only during install

See also:

https://fedoraproject.org/wiki/Packaging:ScriptletSnippets#Syntax

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>

el/mediaproxy-ng.spec

@@ -114,7 +114,9 @@ rm -rf %{buildroot}
 
 
 %post
-/sbin/chkconfig --add mediaproxy-ng
+if [ $1 -eq 1 ]; then
+        /sbin/chkconfig --add %{name} || :
+fi
 
 
 %post dkms