hids_client: skeleton code for connect

tool/compile_gatt: parse EXTERNAL_REPORT_REFERENCE

tool/misc: replace sprintf with snprintf and zero last byte using coccinelle

scan_parameters_service: implement write without response for scan parameters

test/btstack_memory_test: fix malloc test (regression)

move GATT Service clients into ble/gatt-service

ble/battery_service_client: implement query services

fix builds: libusb cmake, tool/metrics, test/mesh

tool/compile_gatt.py: support dynamic descriptors for environmental sensing

tool/compile_gatt.py: extract generic parser for dynamic descriptors for read/write and read-only

hid_host: provide memory pool for hid_host_connection_t

daemon/bindings: fix compile for java and python

gap: emit GAP_EVENT_LOCAL_OOB_DATA

btstack_memory: fix de-init

btstack_memory: fix memory tracking, assert all buffers are freed in deinit

test/btstack_memory: cover no buffers, single buffer, and malloc configurations

tool/compile_gatt: support multiple instances of the same service

tool/convert_gatt_service: add copy of Bluetooth SIG GATT Services page from 2020-07-22

btstack_memory: avoid pointer arithmetic for buffer tracking with HAVE_MALLOC

btstack_memory: track mallocs if HAVE_MALLOC (de-init)

tools: prepare script to update Copyright text

tools: update btstack_root

config: cleanup

tools: don't use binary flag for opening text files

config: tool for updating port configurations