purge: cleanup - remove casefolding check, no longer needed - fold error function into remove - simplify eol logic - remove force logic and parameters

dirstate: improve case-folding logic - return normalized form in directory walk - track normalized form in known

dirstate: fold statwalk and walk

purge: use status

repo.status: eliminate list_

verify: lots of refactoring - simplify finding first bad rev - no need to count changesets - add exc function to simplify exception handling - combine checksize and checkversion to checklog - unify missing revlog detection in checklog - add checkentry to consolidate - linkrev lookup - detailed check of linkrev - detailed check of parents - duplicate checking - use checkentry for changelog, manifest, and files - simplify havecl and havemf - track all changesets refering to a manifest - move unnamed file check somewhere more useful - reorder crosschecks - fix filenodes crosscheck and add exception handling - check unpacked size field

verify: add some local variables

add __len__ and __iter__ methods to repo and revlog

manifest: remove execf/linkf methods

make debugrename work on p1, not tip