It didn't feel right to have a "DHCPClient" in a "Servers" directory.
Rename this to Services to better reflect the type of programs we'll
be putting in there.
This patch removes the internal system menu from WindowServer and
replaces it with two IPC API's:
SetSystemMenu(menu_id)
SetSystemTheme(theme_path, theme_name)
These API's will allow us to complete the SystemMenu program and
move it entirely out of process.