The process of parsing command-line options in commands that
perform an early scan over their arguments (such as 'git bisect',
'git rev-parse', and 'git fast-import') has been unified using a
new early-scan sub-API, which parses and skips known options taking
separate values to prevent logic bugs.
* cc/early-scan-options:
fast-import: use early_scan_options() for --allow-unsafe-features
parse-options: add early_scan_options()
parse-options: extract lookup_long_opt() from parse_long_opt()
parse-options: add parse_options_takes_argument()
8fdf16a778