This package contains a number of functions that allows one to interact
with the operating system from MySQL:
sys_eval - executes an arbitrary command, and returns it's output.
sys_exec - executes an arbitrary command, and returns it's exit code.
sys_get - gets the value of an environment variable.
sys_set - create an environment variable, or update the value of an
existing environment variable.
Use lib_mysqludf_sys_info() to obtain information about the currently
installed version of lib_mysqludf_sys.
Submitted by: David Cornejo <email@example.com>