Add ssl protocol and ciphers in config

config

@@ -25,6 +25,10 @@ ssl = False
 certificate = /etc/apache2/ssl/server.crt
 # SSL private key
 key = /etc/apache2/ssl/server.key
+# SSL Protocol used. See python's ssl module for available values
+protocol = PROTOCOL_SSLv23
+# Ciphers available. See python's ssl module for available ciphers
+ciphers = None
 # Reverse DNS to resolve client address in logs
 dns_lookup = True
 # Root URL of Radicale (starting and ending with a slash)