Formerly, SKIP_CPU_FEATURES is automatically detected by system
processor. However, "^(armv7l|aarch64|s390x)$" does not cover all
processors that cpu_features should be skipped.
"armv6", "armv7", "mips", "mips64" on FreeBSD are examples [1]
that cpu_features is not correctly skipped.
This change intends to build SoftEther without any modifications on
CMakeLists.txt on such processors.
cmake . -DSKIP_CPU_FEATURES=1
[1] https://www.freebsd.org/platforms/
* use OPENSSL_ROOT_DIR
* add special .configure handling for osx
* move readline, curses to cedar
Signed-off-by: Andy Walsh <andy.walsh44+github@gmail.com>