py3: back out c77c925987d7 to store bytes filename in IOError Appears that this is how Python 3 works.

largefiles: headers and values need to be sysstrs, add r prefixes # skip-blame just some r prefixes Differential Revision: https://phab.mercurial-scm.org/D2606

cext: accept arguments as Py_buffer The s*/y* value formatters receive a Py_buffer instead of a char *. This value format is more flexible in the types that it allows. We change bdiff() to accept any object that conforms to the buffer protocol. We validate the buffers are contiguous and have a single dimension. This allows memoryview instances to be handled by the function, so we revert a recent change to cast arguments to bytes before calling this function. Differential Revision: https://phab.mercurial-scm.org/D2587

cext: refactor cleanup code in bdiff() A future commit will need to introduce additional cleanup code. We refactor the cleanup code to check NULL before calling free(). We also initialize these variables as NULL. We set the out of memory exception explicitly, so we can just return result. Differential Revision: https://phab.mercurial-scm.org/D2586

py3: use pycompat.bytestr() to convert error messages to bytes Differential Revision: https://phab.mercurial-scm.org/D2535

url: more bytes/unicodes fussing in url.py around auth handling Once again, these methods are a little annoying to handle because they can get unicodes or bytes depending on who's calling. I think we can probably clean this up a TON once we can run something like pytype and do typechecking of our Python, but until then this is going to be the easy way out. This fixes test-http-bundle1.t. Differential Revision: https://phab.mercurial-scm.org/D2599

httpconnection: convert url to bytes in readauthforuri This method is sometimes called by the stdlib, so we just need to accept both bytes and unicodes here. Awesome. Differential Revision: https://phab.mercurial-scm.org/D2598

tests: prevent enormous output spew in test-lfs-largefiles.t This test currently fails on Python 3, but in a super-slow way. Adding this `head` invocation costs us nothing, but will prevent failures in this area from being super expensive. Differential Revision: https://phab.mercurial-scm.org/D2600

py3: fix formatting of path-auditing errors

py3: make os.curdir a bytes