handle mysql compiled without ssl

mysql doesn't allow ssl=true/false in my.cnf if it hasn't been compiled
with ssl, therefor add a new parameter ssl-disable which makes sure the
template doesn't write anything with ssl to the config.

manifests/params.pp

@@ -212,6 +212,7 @@ class mysql::params {
       'ssl-ca'                => $mysql::params::ssl_ca,
       'ssl-cert'              => $mysql::params::ssl_cert,
       'ssl-key'               => $mysql::params::ssl_key,
+      'ssl-disable'           => false,
       'thread_cache_size'     => '8',
       'thread_stack'          => '256K',
       'tmpdir'                => $mysql::params::tmpdir,

templates/my.cnf.erb

@@ -2,7 +2,9 @@
 <%   if v.is_a?(Hash) -%>
 [<%=   k %>]
 <%     v.sort.map do |ki, vi| -%>
-<%       if vi == true or v == '' -%>
+<%       if ki =~ /^ssl/ and v['ssl-disable'] == true -%>
+<%         next %>
+<%       elsif vi == true or v == '' -%>
 <%=        ki %>
 <%       elsif vi.is_a?(Array) -%>
 <%         vi.each do |vii| -%>