ip: Initial cleanup.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
http-client: http_client_init() --> http_client_initialize()

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
Rename http_client.[ch] --> http.[ch]

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
http: Shorten all function names s/http_client_/http_/

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>