new firmware s9, https://shop.bitmain.com/support.htm?pid=00720161126080548570Q2tDBXAH065D

* Support S9 miners except S9-11.85T，12.93T，14T with fixed frequency
* Remove post mac address and remote stop mining interface
* Fix a bug of memory leak.
* Fix to support keep config when upgrade
* Remove unused *.bitmain.com url strings in binary file in fw.

Don't know what the changes are?