Fix frozen string in recipe _cache

metadata.rb

@@ -3,7 +3,7 @@ maintainer       'HPC'
 maintainer_email 'hpc@gsi.de'
 license          'All rights reserved'
 description      'Installs/Configures Foswiki'
-version          '2.0.5'
+version          '2.0.6'
 depends          'apache2', '< 6.0'
 supports         'debian'
 supports         'ubuntu'

recipes/_cache.rb

@@ -21,7 +21,7 @@ when 'Foswiki::PageCache::DBI::MySQL'
     package 'default-mysql-server'
 
     username = foswiki_secret(node['foswiki']['config']['Cache']['DBI']['MySQL']['Username'])
-    password = foswiki_secret(node['foswiki']['config']['Cache']['DBI']['MySQL']['Password'])
+    password = foswiki_secret(node['foswiki']['config']['Cache']['DBI']['MySQL']['Password']).dup
     database = foswiki_secret(node['foswiki']['config']['Cache']['DBI']['MySQL']['Database'])
 
     password.gsub!('$', '\\$')