Function legiscan_getopt

Wrapper around getopt() that also strips recognized options from $argv

Package: LegiScan\Common
Located at common.php

Parameters summary
`array`	`$valid_options = array()`	An array of long options that are valid
`string`	`$extra = ''`	Additional text that will be added to --help output

Return value summary
`array`	The parsed options and command arguments