Inspection shows that the names of two functions:
api_snat_ipfix_enable_disable()
api_snat_add_del_interface_addr()
don't match their bodies and have been swapped.
Make the world right again by swapping them to match.
Change-Id: Ieefd7f0fdbf52794e8649b0cbbcf6e1403c1b90a
Signed-off-by: Jon Loeliger <jdl@netgate.com>