Fix handling of non-blocking reads in mod_ssl (triggered by recent

change to mod_proxy_http):

* modules/ssl/ssl_engine_io.c (bio_filter_in_read): Return an error if
the read would block so that the SSL_read() caller checks for
SSL_ERROR_WANT_READ, rather than 0, which is treated like EOF.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk/modules/ssl@105768 13f79535-47bb-0310-9956-ffa450edef68