patch: remove unused applydiff() sourcefile argument

patch: remove unused gitworkdone variable from iterhunks()

test-import: use printf instead of echo

import: --no-commit should update .hg/last-message.txt The patch parser goes through all of that trouble extracting the commit message from the patch file. It seems such a waste not to use it.

merge with stable after 1.7 release

Added signature for changeset 333421b9e0f9

Added tag 1.7 for changeset 333421b9e0f9

merge with i18n

i18n-pt_BR: synchronized with b19b4c1df066

dirstate: skip optimization on case-folding FS (issue2440)