It also removes incorrect comment that's not valid any more (leftover from 6933c103e5)
It also removes ESP_THREAD_SAFE macro and sys_mbox_set_owner() which were not used
It also fixes CID 460613: Uninitialized pointer read in api_lib.c, netconn_gethostbyname_addrtype
Updated lwip submodule: git log --oneline 4297782b..aa4f6e78
* api_msg: Fix unused local variable if LWIP_NETCONN_SEM_PER_THREAD=1 (espressif/esp-lwip@aa4f6e78)
* Update submodule: git log --oneline f7922143..a1bd9e44
Detailed description of the changes:
- api_msg: Fix crash to fail-safe error if cannot get semaphore (espressif/esp-lwip@a1bd9e44)