connection.

ssluse.*: Added SSL_strerror(). Curl_SSL_engines_list() now returns a slist
which must be freed by caller.

the others remain at previous values.

UrlState sub-struct. Also made the engine_list exist for non-ssl builds to
make curl build.

Needed elsewhere too?

Moved CURLOPT_SSLENGINE* options to after verbose mode is set.
Added a goto. Eek!

Added Curl_SSL_engines_list(), cleanup SSL in url.c
(no HAVE_OPENSSL_x etc.).

Handle new info list CURLINFO_SSL_ENGINES.

Added CURLINFO_SLIST type for returing a 'struct slist' in
curl_easy_getinfo().
Added CURLINFO_SSL_ENGINES.

by me.

help debugging. (when using ipv6 I fell over this server that didn't have
the ipv6 module loaded)

not the former one

Here's a stab at a consolidation of the SSL detection heuristics into
configure. Source files aren't changed by this patch, except for setup.h and
the various config*.h files.  Within the configure script, OPENSSL_ENABLED is
used to determine if SSL is being used or not, and outside configure,
USE_SSLEAY means the same thing; this could be even further unified some day.

Now, when SSL is not detected, configure skips the various checks that are
dependent on SSL, speeding up the configure process and avoiding complications
with cross compiles.  I also updated all the architecture- specific config
files I could see, but I couldn't test them.