errno? EINTR? what planet was this code on :-? Normalize the

  errno?  EINTR?  what planet was this code on :-?  Normalize the
  ssl_io_filter_connect code to follow the filter read and write.
  Notice that it's buck ugly, but we will extract an rc first from
  the input BIO if it was written, and then try the output bio if
  it was APR_SUCCESS, during _connect processing.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk/modules/ssl@97422 13f79535-47bb-0310-9956-ffa450edef68