sslutil: add a config knob to support TLS (default) or SSLv23 (bc) (issue4038) Prior to this change, we default to SSLv23, which is insecure because it allows use of SSLv2. Unfortunately, there's no constant for OpenSSL to let us use SSLv3 or TLS - we have to pick one or the other. We expose a knob to revert to pre-TLS SSL for the user that has an ancient server that lacks proper TLS support.

largefiles: standardize error message for dirty working dir

cmdutil.bailifchanged: standardize error message for dirty working dir This affects rebase, graft, histedit, and other similar commands.

merge: standardize error message for dirty subrepo

merge: standardize error message for dirty working dir

update: standardize error message for dirty update --check This and following patches will standardize the error message for dirty working directories to "uncommitted changes".

update: improve error message for dirty non-linear update with rev

update: add error message for dirty non-linear update with no rev Previously, the error message for a dirty non-linear update was the same (and relatively unhelpful) whether or not a rev was specified. This patch and an upcoming one will introduce separate, more helpful hints.

update: improve error message for clean non-linear update

pull: for pull --update with failed update, print hint if any An upcoming patch will add a hint to the abort message, and we don't want to lose that here.