* master: (130 commits)
lwip: Define LWIP_ESP8266 in port lwipopts.h not gcc command line
CI: Build the esp-idf-template with the matching branch name, if it exists
README: Add Resources section with some links
Rename README.buildenv to docs/build_system.rst and ReST-ify it
Eclipse docs: Easier to just replace entire PATH, msys32 has everything we need to build/flash
test_build_system: Print ESP_IDF_TEMPLATE_GIT for easier debugging
Name component makefiles component.mk instead of Makefile
Eclipse doc: Add troubleshooting note about Makefile directories
eclipse_make.sh: Fix printing of make directory
Move bin/eclipse_windows_make.sh to tools/windows_eclipse_make.sh
Eclipse docs: Prepend IDF paths to beginning of PATH
Set default SPI flash access mode to DIO
FreeRTOS: temporary solution for memory canaries and memory debug
tcpip_adapter: fix dhcp client work flow
event: not post got ip event if static is invalid
tcpip_adapter: typedef clean up
event: post got ip event when use static ip
tcpip_adapter: use dhcp callback to post got ip event
dhcp: add dhcp callback
lwip: remove netif_reg_addr_change_cb
...
Fixes problems with Eclipse trying to build in directories it shouldn't.
This is a breaking change for existing repositories, they need to rename
any component Makefiles to component.mk and rename their references to
$(IDF_PATH)/make/component.mk to $(IDF_PATH)/make/component_common.mk
