Update to 0.72. From the changelog:

- RT #94974: I forgot that `return` just returns from the code block for
  `catch`, not the subroutine so `filter_libs` was still trying to link
  against various libraries even when Devel::CheckLib was not installed.

- Various minor fixes to C code
- Various fixes to the distribution such as manifest files, additional
  tests, bundled module etc
- Address RT bugs #94828 and #79212

- REMINDER: make test WILL FAIL if your OpenSSL is vulnerable to Heartbleed.

- Add additional functions exposing information that can be obtained via
  SSLeay_version.

- Add ability to query OpenSSL version, add test whether OpenSSL library
  being used is vulnerable to the Heartbleed bug.

- Assorted fixes to Makefile.PL, most importantly to fix build problems with
  Strawberry Perl.

- In Makefile.PL, use assert_lib to find the libraries against which we can
  actually link rather than passing a big bowl of libs to WriteMakefile.
  Bail out early if we can't link against any of the candidate libraries.

- Make sure t/02-live.t actually uses Net::SSL.

- Address RT bugs #88786, #88269, #78848, and #79477

- Makefile.PL now respects live-tests and no-live-tests, and allows library
  and header locations to be specified via the command line arguments
  libpath and incpath, respectively.

- These options can also be specified using the environment variables

        CRYPT_SSLEAY_LIVE_TEST_WANTED
        OPENSSL_LIB
        OPENSSL_INC

- Also fixed a number of embarrasing logic errors and typos in Makefile.PL
  which were introduced in previous 0.65_xx versions.

- Reorganize Makefile.PL to allow incpath and libpath command line
  arguments. This attempts to address RT #88786, #88269, #79477, and #78848.
  This was supposed to be the next step immediately after drastically
  specifying Makefile.PL. But never got done.

- Also add encoded version number to openssl-version output.

- Address pull requests from GitHub and bug reports on RT. These address RT
  issues #83764, #86425, #86819, #62133, #82715, #90803


(schmonz)