tests: make test-commandserver.py output readable

tests: 'hghave unix-permissions' for test-import.t 'hg import' of a patch with mode changes requires unix permissions support in the file system.

tests: skip color test on platforms without tic

update: don't clobber untracked files with wrong casing

merge with i18n

merge with i18n

i18n-pt_BR: synchronized with 00276525e2b7

merge with stable

help: Backed out changeset e99facd2cd2a, description of file urls This help entry didn't try to describe the 'localhost' notation. It described a non-standard host-less notation where 'local' just was the first part of a sample relative path. It describe "urls" with relative and absolute paths like: file://file.txt file:///tmp/file.txt file://c:/tmp/file.txt

revset: follow(nosuchfile) should give an empty set (issue3114)