The rpcd ucode plugin allows utilizing ucode scripts to register ubus
objects and to implement the objects method callbacks.
Upon startup, rpcd will compile and execute each ucode script in
`$INSTALL_PREFIX/share/ucode/` and register ubus proxy objects and
methods definitions according to the signature returned by the script.
Refer to examples/ucode/example-plugin.uc for details of the signature
format.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>