roles/aurweb: Switch to using a socket for memcached

For security reasons, switch to using a socket for memcached on aurweb.

roles/aurweb/defaults/main.yml

@@ -24,5 +24,5 @@ aurweb_cache: 'memcache'
 aurweb_cache_pkginfo_ttl: '86400'
 aurweb_request_limt: '4000'
 aurweb_window_length: '86400'
-aurweb_memcached_host: 'localhost'
+aurweb_memcached_socket: '/run/memcached/aurweb.sock'
 aurweb_memcached_memory: 2048
\ No newline at end of file

roles/aurweb/templates/aurweb-memcached.service.j2

@@ -5,7 +5,7 @@ After=network.target
 [Service]
 User={{ aurweb_user }}
 Group=memcached
-ExecStart=/usr/bin/memcached -l {{ aurweb_memcached_host }} -m {{ aurweb_memcached_memory }} -o modern
+ExecStart=/usr/bin/memcached -s {{ aurweb_memcached_socket }} -m {{ aurweb_memcached_memory }} -o modern
 Restart=always
 NoNewPrivileges=yes
 PrivateTmp=yes

roles/aurweb/templates/config.j2

@@ -15,6 +15,7 @@ cache = {{ aurweb_cache }}
 cache_pkginfo_ttl = {{ aurweb_cache_pkginfo_ttl }}
 git_clone_uri_anon = https://{{ aurweb_domain }}/%s.git
 git_clone_uri_priv = ssh://{{ aurweb_user }}@{{ aurweb_domain }}/%s.git
+memcache_servers = {{ aurweb_memcached_socket }}:0
 
 [ratelimit]
 request_limit = {{ aurweb_request_limt }}