Convert logfile to bool in if statement

If statement requires boolean and logfile was passed as string. Added str2bool function to convert logfile to boolean in if statement when testing if logfile and syslog are defined.

Author: mmarseglia

manifests/init.pp

@@ -44,7 +44,7 @@
 
   # Logging to syslog and file are mutually exclusive
   # Fail if both options are defined
-  if $syslog and $logfile {
+  if $syslog and str2bool("$logfile") {
     fail 'Define either syslog or logfile as logging destinations but not both.'
   }