Log Message:
Update p5-CGI to 4.22:

4.22 2015-10-16

    [ RELEASE NOTES ]
    - Documentation fixes only - please see v4.21 Changes for any potentially
      impacting changes

    [ DOCUMENTATION ]
    - fix typos in CONTRIBUTING file
    - links to docs, stackoverflow and perlmonks
    - clarify deprecation policy on HTML functions (GH #188)
    - mention HTML::Tiny in CGI::HTML::Functions (thanks to osfameron for
      the suggestion)