Uses prosodyctl default inputs.

debian/jitsi-meet-prosody.postinst

@@ -113,7 +113,8 @@ case "$1" in
 
         if [ ! -f /var/lib/prosody/$JVB_HOSTNAME.crt ]; then
             # prosodyctl takes care for the permissions
-            prosodyctl cert generate $JVB_HOSTNAME
+            # echo for using all default values
+            echo | prosodyctl cert generate $JVB_HOSTNAME
 
             ln -sf /var/lib/prosody/$JVB_HOSTNAME.key /etc/prosody/certs/$JVB_HOSTNAME.key
             ln -sf /var/lib/prosody/$JVB_HOSTNAME.crt /etc/prosody/certs/$JVB_HOSTNAME.crt
@@ -121,7 +122,8 @@ case "$1" in
 
         if [ ! -f /var/lib/prosody/$JICOFO_AUTH_DOMAIN.crt ]; then
             # prosodyctl takes care for the permissions
-            prosodyctl cert generate $JICOFO_AUTH_DOMAIN
+            # echo for using all default values
+            echo | prosodyctl cert generate $JICOFO_AUTH_DOMAIN
 
             ln -sf /var/lib/prosody/$JICOFO_AUTH_DOMAIN.key /etc/prosody/certs/$JICOFO_AUTH_DOMAIN.key
             ln -sf /var/lib/prosody/$JICOFO_AUTH_DOMAIN.crt /etc/prosody/certs/$JICOFO_AUTH_DOMAIN.crt