embedded: streamline timer management using btstack_time_delta

windows: handle time_ms overrun after 49 days

wiced: handle time_ms overrun after 49 days

freertos: handle time_ms overrun after 49 days

posix: handle time_ms overrun after 49 days

lwip: fix compile for NO_SYS

lwip: create helper functions to abstract NO_SYS vs. SYS

freertos: directly call function if already on main thread

libusb: avoid use-after-free by not holding a pointer to next transfer when calling packet handler

lwip: fix compile in OS config

lwip: add readme

lwip: move nosys port into platform/lwip/port folder

new pan_lwip_http_server example

- add lwIP sources commit b3a939417 (after STABLE-2.1.1) as 3rd-party/lwip/core
- add small DHCP server as 3rd-party/lwip/dhcp-server
- add BNEP lwIP adapter that ha

new pan_lwip_http_server example

- add lwIP sources commit b3a939417 (after STABLE-2.1.1) as 3rd-party/lwip/core
- add small DHCP server as 3rd-party/lwip/dhcp-server
- add BNEP lwIP adapter that handles BNEP events and forwards packets between BNEP and lwIP (only tested for NO_SYS == 1)
- add pan_lwip_http_server example that provides lwIP http server on http://192.168.7.1
- example is added to port/libusb

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freertos: HAVE_FREERTOS_INCLUDE_PREFIX if FreeRTOS headers are in 'freertos' folder, update esp32 config to use it

btstack_stdin_posix: fix unused result warning

btstack_tlv_posix: avoid fwrite with len = 0 and ptr = NULL

btstack_tlv_flash_bank: support alignment 8 with ENABLE_TLV_FLASH_EXPLICIT_DELETE_FIELD

btstack_tlv_flash_bank: reduce debut output

btstack_tlv_flash_bank: support targets where a value cannot be overwritten with zero

posix: fix compile for linux again (regression from 766df38f0f)

libusb: fix compile and skip resetting device on freebsd

posix: fix includes in btstack_network_posix.c for freebsd

Use BTSTACK_FILE__ without __ prefix (MISRAC2012-Rule-21.1)

Use FILENAME_H as include guard (MISRAC2012-Rule-21.1)

fix built