-memcached_server_push() pushes an array of memcached_server_st into the memcached_st
-structure. These servers will be placed at the end. Duplicate servers are
-allowed, so duplication is not checked. A copy is made of structure so the
-list provided (and any operations on the list) are not saved.
+memcached_server_add_udp() pushes a single UDP server into the C<memcached_st>
+structure. This server will be placed at the end. Duplicate servers are
+allowed, so duplication is not checked. Executing this function with out
+setting the C<MEMCACHED_BEHAVIOR_USE_UDP> behavior will result in a
+C<MEMCACHED_INVALID_HOST_PROTOCOL>.
+
+memcached_server_add_unix_socket() pushes a single UNIX socket into the
+C<memcached_st> structure. This UNIX socket will be placed at the end.
+Duplicate servers are allowed, so duplication is not checked. The length
+of the filename must be one character less then MEMCACHED_MAX_HOST_LENGTH.
+
+memcached_server_push() pushes an array of C<memcached_server_st> into
+the C<memcached_st> structure. These servers will be placed at the
+end. Duplicate servers are allowed, so duplication is not checked. A
+copy is made of structure so the list provided (and any operations on
+the list) are not saved.
+
+memcached_server_by_key() allows you to provide a key and retrieve the
+server which would be used for assignment. This structure is cloned
+from its original structure and must be freed. If NULL is returned you
+should consult *error. The returning structure should be freed with
+memcached_server_free().
+
+memcached_server_get_last_disconnect() returns a pointer to the last server
+for which there was a connection problem. It does not mean this particular
+server is currently dead but if the library is reporting a server is,
+the returned server is a very good candidate.