Add favicon to customized version of httpd-2.2.3-74.el5 package.
    
    - Previous to this commit both error screens and directory listing
      produced by httpd do not show the CentOS favicon in the browser's
      navigation bar. This made error screens and directory listing to
      be unconnected from other sites like wiki ang bugs that do show the
      CentOS favicon in the browser's navigation bar. This commit fixes
      this issue by adding favicon.ico to images/ directory and setting
      the appropriate configuration on errors, indexes, and customized
      httpd configuration file (webenv.conf).
    
    - Previous to this commit the body an html tags were not closed. This
      make the resultant document to comply not with its document type
      definition (XHTML 1.0 Transitional).  This commit fixes closes both
      body and html tags making the document comply with its document type
      definition.
    
    - Previous to this commit there was pour tag's indentation in indexes
      template files. This make reading HTML markup difficult. In this
      commit, indent tags inside index template files to improve HTML
      markup reading.