[__jitsi_meet*] Relocate hash_bucket_size nginx directive

This was causing issues in multi-domain scenarios where it'd get duplicated.

Fixes #8

type/__jitsi_meet/manifest

@@ -118,6 +118,8 @@ require="__directory${NGINX_ETC}/sites-available" __file "${NGINX_ETC}/sites-ava
   --source - << EOF
 # This file is managed remotely, all changes will be lost
 
+server_names_hash_bucket_size 64;
+
 # nginx server configuration for:
 
 server {

type/__jitsi_meet_domain/files/nginx.sh

@@ -2,8 +2,6 @@
 
 # shellcheck disable=SC2034  # This is intended to be included
 JITSI_NGINX_CONFIG="$(cat <<EOF
-server_names_hash_bucket_size 64;
-
 server {
     listen 80;
     listen [::]:80;