changing mod_ssl to do a full startup/teardown on each restart rather

changing mod_ssl to do a full startup/teardown on each restart rather
than hack to only read passphrase on 1st round startup.  this change:
- fixes current segv on restarts (SHARED_MODULE is not defined)
- allows LoadModule ssl_module to be added to httpd.conf on restart
  (was core dumping previously)
- allows certs/keys to be changed on restart provided key is not
  encrypted or SSLPassPhraseDialog is exec.  if key is encrypted and
  SSLPassPhraseDialog is builtin, existing private keys will be reused
  on restart (which happens currently for any type of key/dialog).

note: mod_ssl currently leaks on restart; leaks more with this change.
      fixes to come.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk/modules/ssl@93585 13f79535-47bb-0310-9956-ffa450edef68