Plain import of the src/modules/ssl/ subdir from

Plain import of the src/modules/ssl/ subdir from
    Apache 1.3.19 + mod_ssl 2.8.3
This is still totally untouched and is still not usable inside Apache
2.0 in any way, of course. But we import it in original form to have a
reasonable CVS history which allows us to compare Apache 2.0's future
mod_ssl with the old and now frozen version for Apache 1.3.

PS: Please do not touch this stuff until the following next steps were
    done over the next two days:
    o adjustments of all license texts because this code's copyright
      is transferred to the ASF under the Apache license (v1.1)
    o stripping down the code by removing all files which are already
      obsolete (because of APR, etc.)
    o temporarily disabling all code with #if-0's
    o integrating this source tree part into the build procedure
    After these steps were performed, feel free to touch whatever you want
    to touch.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/avendor@88991 13f79535-47bb-0310-9956-ffa450edef68