Add 'README.socket'.

README.socket

@@ -0,0 +1,30 @@
+# ---
+# - Compile in default mysql soccket
+# ---
+cmake
+   ...
+   -DMYSQL_UNIX_ADDR=/run/mysqld/mysqld.sock
+
+
+# ---
+# - Set socket in php.ini file
+# ---
+
+[Pdo_mysql]
+; Default socket name for local MySQL connects.  If empty, uses the built-in
+; MySQL defaults.
+pdo_mysql.default_socket= /run/mysqld/mysqld.sock
+
+[MySQLi]
+; Default socket name for local MySQL connects.  If empty, uses the built-in
+; MySQL defaults.
+; http://php.net/mysqli.default-socket
+mysqli.default_socket = /run/mysqld/mysqld.sock
+
+# - Deprecated Mysql Connector
+# -
+[MySQL]
+; Default socket name for local MySQL connects.  If empty, uses the built-in
+; MySQL defaults.
+; http://php.net/mysql.default-socket
+mysql.default_socket = "/run/mysqld/mysqld.sock"