Ensure that PHP doesn't interpret read ini file values and therefor

scrambles the output of hgrc files (issue 523).

NEWS.mdtext

@@ -5,6 +5,10 @@ or newer to run properly!
 
 ## Bugfixes
 
+- A long standing bug in the Mercurial plugin that lead to corruption
+  of boolean configuration values in the `hgrc` of the served repository
+  has been fixed (issue 523).
+ 
 - If an anonymous or authenticated user had no access to any project in a 
   forge, all projects were listed for him (but still no one was actually
   accessible). This has been fixed. 

src/IDF/Plugin/SyncMercurial.php

@@ -178,7 +178,10 @@ class IDF_Plugin_SyncMercurial
 
         // Generate hgrc content 
         if (is_file($hgrc_file)) {
-            $tmp_content = parse_ini_file($hgrc_file, true);
+            $tmp_content = @parse_ini_file($hgrc_file, true, INI_SCANNER_RAW);
+            if ($tmp_content === false) {
+              throw new Exception('could not parse "'.$hgrc_file.'" because of syntax problems');
+            }
             $tmp_content['web']['allow_push'] = $allow_push;
         }
         else {