Fix configure script
Fix configure script

 * properly iterate over all args, respecting quoted ones
 * fix --prefix | -p handling
 * exit on --help

Signed-off-by: Lucas Gabriel Vuotto <4f9975a6acaec9764a6f2224b8afe236190e2617@gmail.com>

oridb/mc,oridb/mc,oridb/mc,oridb/mc