merge default into stable for 2.4 code freeze

hgwebdir: make collapsed folders easier to distinguish from repositories Add a "/" character after the collapsed folder names, to make them easier to distinguish from regular repository and subrepository entries.

help: indicate help omitting if help document is not fully displayed Before this patch, there is no information about whether help document is fully displayed or not. So, some users seem to misunderstand "-v" for "hg help" just as "the option to show list of global options": experience on "hg help -v" for some commands not containing verbose containers may strengthen this misunderstanding. Such users have less opportunity for noticing omitted help document, and this may cause insufficient understanding about Mercurial. This patch indicates help omitting, if help document is not fully displayed. For command help, the message below is displayed at the end of help output, if help document is not fully displayed: use "hg -v help xxxx" to show more complete help and the global options and otherwise: use "hg -v help xxxx" to show the global options For topics and extensions help, the message below is displayed, only if help document is not fully displayed: use "hg help -v xxxx" to show more complete help This allows users to know whether there is any omitted information or not exactly, and can trigger "hg help -v" invocation. This patch causes formatting help document twice, to switch messages one for omitted help, and another for not omitted. This decreases performance of help document formatting, but it is not mainly focused at help command invocation, so this wouldn't become problem.

httpclient: fix calling convention violation

largefiles: distinguish "no remote repo" from "no files to upload" (issue3651) Before this patch, when no files to upload, "hg outgoing --large" and "hg summary --large" show "no remote repo", even though valid remote repository is specified. It is because that "getoutgoinglfiles()" returns None, not only if no valid remote repository is specified, but also if no files to upload. This patch makes "getoutgoinglfiles()" return empty list when no files to upload, and makes largefiles show "no files to upload" message at that time. This patch doesn't test "if toupload is None" route in "overrideoutgoing()", because this route is not executed unless remote repository becomes inaccessible just before largefiles specific processing: successful execution of "orig()" means that at least one of "default", "default-push" or dest is valid one, and that "getoutgoinglfiles()" never returns None in such cases. At "hg summary --large" invocation, this patch shows message below: largefiles: (no files to upload) This follows the message shown by "hg summary" with MQ: mq: (empty queue)

push: refuse to push bumped changeset This applies the same logic as used for `obsolete` and `unstable` changesets. Refuse to push them without force. We'll probably want to factor this logic with two new functions `pctx.troubled()` and `ctx.troubles()`. But I'm waiting for the third "trouble" to make it into core.

obsolete: simplify push abort message to: push includes xxx changeset: yyyyyyyyyy

context: add a `bumped` method to `changectx` Same as `unstable()`, returns true if the changeset is bumped.

obsolete: add a flag that allows fixing "bumped" changeset The first obsolescence flag is introduced to allows for fixing the "bumped" changeset situation. bumpedfix == 1. Creator of new changesets intended to fix "bumped" situation should not forget to add this flag to the marker. Otherwise the newly created changeset will be bumped too. See inlined documentation for details.

debugobsolete: add --flags option This options allows to specify the `flag` part of obsolete markers. For details about marker flags, check the `mercurial/obsolete.py` documentation. Some random flag are added to a marker to test this feature.