Update p5-CGI-Session to 4.48.

Changes from previous:
4.48 - July 11th, 2011
    No code changes.

    * INTERNAL: quit using "use diagnostics;" to avert some test failures

4.47 - July 8th, 2011
    No code changes.

    * DOCS: minor POD fixes (Rene Mayorga and Nicholas Bamber)

4.46 - July 8th, 2011
    No code changes.

    * INTERNAL: More packaging fixes.

4.45 - July 1st, 2011
    No code changes.

   * INTERNAL: Fix packaging problem with 4.44.

4.44 - June 6th, 2011

   * FIX: Fix 5.14 compatibility issue (Walt Arstingstall)
   * DOCS: Clarify docs for static ID generator (oalders)

4.43 - Saturday, December 11, 2010

    * FIX: Avoid deleting unmatched sessions when calling find() when ip_match is enabled.
        Closes RT#47795. Thanks to m-uchino, Ron Savage, and Mark Stosberg

    * NEW: new public ip_match() method is available, primarily for use with find(). (Ron Savage, Mark Stosberg)

    * DOCS: UTF8 related documentation was updated.

    * INTERNAL: Don't add _SESSION_EXPIRE_LIST to internal hash unless we need to.
                RT#51192, Thanks to Pavel V. Rochnyack, Ron Savage, Mark Stosberg
    * INTERNAL: Avoid calling sprintf() in CGI::Session::ErrorHandler, fixing RT#48733
        Solves taint error for Perl V 5.10.0. All well-written code will have
        been using errstr() to retrieve errors anyway so this change will not
        affect any code which obeys the API. (Peter Kaminsk, Ron Savage, Mark Stosberg)
    * INTERNAL: The undocumented 4th parameter to load() has changed its meaning.
	* INTERNAL: Test suite improvements. (Ron Savage, Mark Stosberg)


(hiramatsu)