Possible compatibility problems with earlier versions marked with '*'.
+--- 2.0.20 2004/05/10
+
+Add autoconf m4 macro YAZ_DOC for YAZ documentation setup (docbook).
+
+SSL comstack now uses yaz.pem certificate file on server side
+by default. Certificate filename can be configured by calling
+comstack function cs_set_ssl_certificate_file before cs_bind is used.
+
+Fix bug regarding multiple calls to ZOOM_connection_connect.
+
Implement cs_set_ssl_ctx which sets SSL_CTX for SSL comstack.
Do not create SSL_CTX in cs_create (ssl_type). Create in tcpip_bind,