tests/unwrap-message-id.py

phases: apply similar early filtering to advanceboundary

advanceboundary is called the push's unbundle (but not the other unbundle) so
advanceboundary did not show up the profile I looked at so far.

We start with simple pre-filtering to avoid doing any work if we don't needs
too.

import sys

for line in sys.stdin:
    if line.lower() in ("message-id: \n", "in-reply-to: \n"):
        line = line[:-2]
    print(line, end="")