dispatch: verify result of early command parsing Before, early options were stripped from args, and because of this, some kind of parsing errors weren't reported. For example, $ hg ci -m -Ra file would execute "hg ci -m file" in repository "a". This patch fixes the issue by parsing early options again by real getopt-based parser, and verifying the results. If the early parsing appears wrong, hg just aborts. The current error message seems not nice, and should be improved, maybe in V2 or follow-up. Note that this isn't a security feature because we can still do anything by using shell aliases.

dispatch: convert non-list option parsed by _earlygetopt() to string So we can easily compare it with the corresponding getopt() result. There's a minor behavior change. Before, "hg --cwd ''" failed with ENOENT. But with this patch, an empty cwd is silently ignored. "hg -R ''" has always worked as such, so -R has no BC.

dispatch: add option to not strip command args parsed by _earlygetopt() This allows us to parse the original args later by full-blown getopt() in order to verify the result of the faulty early parsing. Still we need the 'strip=True' behavior for shell aliases. Note that this series is RFC because it seems to change too much to be included in stable release.