Support hyphens and underscores for meetpad rooms

Many people put hyphens (-) and underscores (_) in their pad names,
and Jitsi-Meet seems to support them in its room names too, so add
them to our rewrite regex.

Change-Id: I819b8d56bf839cf743319e9cd823440c7d910001

docker/jitsi-meet/web/rootfs/defaults/meet.conf

@@ -6,7 +6,7 @@ root /usr/share/jitsi-meet;
 index index.html
 error_page 404 /static/404.html;
 
-location ~ ^/([a-zA-Z0-9=\?]+)$ {
+location ~ ^/([a-zA-Z0-9=\?_-]+)$ {
     rewrite ^/(.*)$ / break;
 }
 

playbooks/roles/jitsi-meet/files/meet.conf

@@ -6,7 +6,7 @@ root /usr/share/jitsi-meet;
 index index.html
 error_page 404 /static/404.html;
 
-location ~ ^/([a-zA-Z0-9=\?]+)$ {
+location ~ ^/([a-zA-Z0-9=\?_-]+)$ {
     rewrite ^/(.*)$ / break;
 }