icasefs: refactor "test-casecollision-merge.t" to reuse in succeeding fixes This patch refactors "test-casecollision-merge.t" to increase reusability in succeeding patches. It is confirmed that changed test also can detect issue3370.

icasefs: ignore removed files at building "dirstate._foldmap" up on icasefs Before this patch, all files in dirstate are used to build "_foldmap" up on case insensitive filesystem regardless of their statuses. For example, when dirstate contains both removed file 'a' and added file 'A', "_foldmap" may be updated finally by removed file 'a'. This causes unexpected status information for added file 'A' at "hg status" invocation. This patch ignores removed files at building "_foldmap" up on case insensitive filessytem. This patch doesn't add any test, because this issue is difficult to reproduce intentionally: it depends on iteration order of "dirstate._map".

i18n-pt_BR: synchronized with 3f5e75c22585

merge with i18n

i18n-ja: synchronized with f01a351db791

dispatch: add support for --option=value to _earlygetopt This fixes a very confusing error message: $ hg --config=pager.enabled=off st abort: option --config may not be abbreviated!

dispatch: add doctests for _earlygetopt

push: make locking of source optional (issue3684) Having the permission to lock the source repo on push is now optional. When the repo cannot be locked, phase are not changed locally. A status message is issue when some actual phase movement are skipped: cannot lock source repo, skipping local public phase update A debug message with the exact reason of the locking failure is issued in all case.

push: factorise phase movement in a simple closure Having all phases movement centralised will help to handle special case when the local repo can not be locked as describe in issue 3684.

merge: increase safety of parallel updating/removing on icasefs "merge.applyupdates()" sorts "actions" in removal first order, and "workeractions" derived from it should be also sorted. If each actions in "workeractions" are executed in serial, this sorting ensures that merging/updating process is collision free, because updating the file in target context is always executed after removing the existing file which causes case-folding collision against the former. In the other hand, if each actions are executed in parallel, updating on a worker process may be executed before removing on another worker process, because "worker.partition()" partitions list of actions regardless of type of each actions. This patch divides "workeractions" into removing and updating, and executes the former first. This patch still scans "actions"/"workeractions" some times for ease of patch review, even though large list may cost much in this way. (total cost should be as same as before) This also changes some tests, because dividing "workeractions" affects progress indication.

hgweb: handle filtered "0" rev in navigation Before this changeset, navigation generation crashed if revision "0" was filtered. We introduce a `_first` methods on revision navigation that return the lowest unfiltered element and use it in two place were the "0" changeset was explicitly referenced. Test case are introduced.

hgweb: fix empty navigation detection For some obscure reason, changelog.node(0) returns nullid if changelog is empty. this break empty navigation detection. We fix this code by using the length of the changelog. Using the length have some issue with revision filtering but this is a small step in the right direction. Proper fix comes in later changeset.