OpenWrt toolchains already use correct CFLAGS for every ARM target
There is no reason to use conservative CFLAGS now
It also causes compile error with GCC 9.1.0

Signed-off-by: Deng Qingfang <dengqf6@mail2.sysu.edu.cn>

Signed-off-by: Moritz Warning <moritzwarning@web.de>

Signed-off-by: Moritz Warning <moritzwarning@web.de>

Signed-off-by: Moritz Warning <moritzwarning@web.de>

Signed-off-by: Moritz Warning <moritzwarning@web.de>

Signed-off-by: Moritz Warning <moritzwarning@web.de>

* add config_path option since the controller mode needs a persisting path to be used
* add patch to fix a bug in the controller code (https://github.com/zerotier/ZeroTierOne/issues/553)
* disable zerotier by default, as the default settings let it connect to a public network

Signed-off-by: Moritz Warning <moritzwarning@web.de>

ZeroTier builds fine with GCC 4.8, so relax the check to make that
possible.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

Zerotier now needs to have libstd, libminiupnpc and libnatpmp.

Signed-off-by: Moritz Warning <moritzwarning@web.de>

Signed-off-by: Moritz Warning <moritzwarning@web.de>

HTTP header content-disposition isn't honored resulting in source tarball name only containing version number.
Switch to GIT repo as workaround to avoid clashing filenames.

Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>

Signed-off-by: Moritz Warning <moritzwarning@web.de>