Installing mysql2 gem on macports: ld: library not found for -lzstd

gistfile1.txt

Modify the mysql build options to use a `lzstd` library

Step one: 
Make a symlink of lzstd in the macports default install library 

`ln -fs /opt/local/lib/zstd /usr/local/lib/lzstd`

Step two: 
Allow install of mysql2 to use the symlinked lzstd version (and also quiet any implicit function declaration warnings to get cleaner output)

`bundle config build.mysql2 --with-mysql-config=/opt/local/lib/mysql8/bin/mysql_config --with-cflags="-Wno-error=implicit-function-declaration" --with-opt-dir="/opt/local" --with-opt-include="/opt/local/lib/lzstd"`