minor todo.org updates
[test suite] added --enable-openssl-checks

Added --enable-openssl-checks to send all SPA packets encrypted via libfko
through the OpenSSL library to ensure that the libfko usage of AES is always
compatible with OpenSSL.  This ensures that the fwknop usage of AES is properly
implemented as verified by the OpenSSL library, which is a frequently audited
high profile crypto engine.  If a vulnerability is discovered in OpenSSL and a
change is made, then the --enable-openssl-checks mode will allow the test suite
to discover this in a automated fashion for fwknop.
Fixed gcc warning for the md5 driver.

md5.c: In function 'MD5Final':
md5.c:166:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
md5.c:167:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]

Debian Gnu/Linux on i386 build against 2.0.4 :

https://buildd.debian.org/status/fetch.php?pkg=fwknop&arch=i386&ver=2.0.4-1&stamp=1358610541
minor typo spelling fix
memset() AES buffers to zero
openssl tests to use '-pass file:' method for setting passphrase
Maintain backwards compatibility with old "zero padding" code

[libfko] Added the ability to maintain backwards compatibility with the
now deprecated "zero padding" strategy in AES mode that was a hold over
from the old perl fwknop implementation.  This enables the backwards
compatiblity tests to continue to pass in the test suite.
ensure test/conf/ files are included
added encryption_mode() support to perl FKO module
added legacy IV tests for perl FKO client -> C server
added fuzzing test counters with summary output
more legacy IV mode tests with the perl FKO module
Merge remote-tracking branch 'fjoncourt/hmac_support' into hmac_support

Applied fix from Franck Joncourt for the 'warning: dereferencing type-punned
pointer will break strict-aliasing rules [-Wstrict-aliasing]' error in the
MD5 digest code.
[test suite] bug fix for 'set_legacy_iv' mode in perl_fko_module_complete_cycle()