Update to 1.91
    
    - New upstream release 1.91
      - Added IO::Socket::SSL::Utils for easier manipulation of certificates and
        keys
      - Moved SSL interception into IO::Socket::SSL::Intercept and simplified it
        using IO::Socket::SSL::Utils
      - Enhance meta information in Makefile.PL
    - Bump openssl version requirement to 0.9.8a
    - Need at least version 6.58 of ExtUtils::MakeMaker (CPAN RT#85739)