codegen: generate action() overloads using header/url params

Change-Id: I04677486b168ed0b41449889cf80e01ea6841a9c
Signed-off-by: Michael Pasternak <mpastern@redhat.com>
codegen: implements doc support for overloads using header/url params

Change-Id: I2b66cdc07bd7ececf8a2a8f0581c8bb1d04ce495
Signed-off-by: Michael Pasternak <mpastern@redhat.com>