dirstate.status: avoid putting ignored files in the unknown list If list_ignored was false, we would blindly add files not in the dirstate to the unknown list. This should finish fixing issue886.

dirstate: don't walk ignored directories With a pattern like '^directory$' in .hgignore, a "hg status directory" would still walk "directory" and all its subdirs. This is the first half of a fix for issue886.