r3586: Fix some of the issues with the module init functions.

Both subsystems and modules can now have init functions, which can be
specified in .mk files (INIT_FUNCTION = ...)

The build system will define :
 - SUBSYSTEM_init_static_modules that calls the init functions of all statically compiled modules. Failing to load will generate an error which is not fatal
 - BINARY_init_subsystems that calls the init functions (if defined) for the subsystems the binary depends on

This removes the hack with the "static bool Initialised = " and the
"lazy_init" functions

source/lib/socket/socket_ipv4.c

@@ -336,8 +336,3 @@ const struct socket_ops *socket_ipv4_ops(void)
 {
 	return &ipv4_tcp_ops;
 }
-
-NTSTATUS socket_ipv4_init(void)
-{
-	return NT_STATUS_OK;
-}