add server-side command escape w/ public echo for admins

Signed-off-by: Jason Volk <jason@zemos.net>

conduwuit-example.toml

@@ -198,6 +198,11 @@ registration_token = "change this token for something specific to your server"
 # defaults to false
 # block_non_admin_invites = false
 
+# Allows admins to enter commands in rooms other than #admins by prefixing with \!admin. The reply
+# will be publicly visible to the room, originating from the sender.
+# defaults to true
+#admin_escape_commands = true
+
 # List of forbidden username patterns/strings. Values in this list are matched as *contains*.
 # This is checked upon username availability check, registration, and startup as warnings if any local users in your database
 # have a forbidden username.