'Mysqldump' and 'Tar' config documentation, added option 'showStdErr'

Author: sebastianfeldmann

doc/config/source/mysqldump.xml

@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <source type="mysqldump">
+  <!-- optional, default=false -->
+  <option name="showStdErr" value="true" />
+
   <!-- optional, default=localhost -->
   <option name="host" value="myhost" />
 

doc/config/source/tar.xml

@@ -2,4 +2,7 @@
 <source type="tar">
   <!-- mandatory -->
   <option name="path" value="src" />
+
+  <!-- optional, default=false -->
+  <option name="showStdErr" value="true" />
 </source>