Instead of having perl modules under test/testlib, util and util/perl,
consolidate them all to be inside util/perl.
Reviewed-by: NAndy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4069)

Reviewed-by: NRichard Levitte <levitte@openssl.org>

Because we're requiring Perl 5.10.0 and the 'parent' didn't appear
before Perl 5.10.1, we need to resort to the older parent module
declaration style, modifying @ISA.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

Reviewed-by: NMatt Caswell <matt@openssl.org>

This involves adding $TOP/util as perl library in test/run_tests.pl.
Reviewed-by: NRich Salz <rsalz@openssl.org>

When using an anon DH ciphersuite a client should reject a 0 value for p.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Two tests are added: one is a simple version tolerance test; the second is
a test to ensure that OpenSSL operates correctly in the case of a zero
length extensions block. The latter was broken inadvertently (now fixed)
and it would have been helpful to have a test case for it.
Reviewed-by: NRichard Levitte <levitte@openssl.org>