Update Spanish Translation

* manual/mod/leader.xml.es
  manual/vhosts/index.xml.es
  manual/index.xml.es:
    Update translation

* manual/dso.xml.es: new file

Translated by: Jesús Blanco <blanco@bitrock.com>
Reviewed by: Daniel López


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.0.x@159489 13f79535-47bb-0310-9956-ffa450edef68