* Upgrade to https: serving for JSON, links in docs
Fixes#5480
* Update boards.rst documentation
* Update more documentation http: refs to https:
* Remove obsolete staging info
* Drop obsolete versions from JSON programatically
After the final merge is done on the JSON, strip out any named versions
from the final product.
Removing 1.6.5-* and 2.5.0-beta(1,2,3) for now.
* Remove 2.4.0-rc(0/1) from JSON, too
* interactive example: update with option for using DHCP again after using static IP
* lwip2: avoid crash when IP address is set to 0(any) by dhcp not getting its lease renewal in due time
* lwip2: automatically remove oldest PCBs in time-wait state, limit their number
thanks to @me-no-dev 07f4d4c241 (diff-f8258e71e25fb9985ca3799e3d8b88ecR399)
* faq: update about tcpCleanup()
* lwip2: add a macro HAS_PHY_CAPTURE=1 indicating capture facility is available