convert-bazaar: use breezy package instead of old bzr one Breezy is the most recent of the two, and works on Python 3 while being compatible with the (old) Bazaar file format. This patch contains a variety of unicode <-> bytes changes, API breakage fixing, restoring failing imports and changing the executable from `bzr` to `brz`. I recommend using the debian packages for `brz` and `python3-breezy` (3.1+), because the pip package seems to be haunted by radioactive dragons. Differential Revision: https://phab.mercurial-scm.org/D10513

--- a/contrib/import-checker.py	Wed Apr 21 10:58:21 2021 +0200
+++ b/contrib/import-checker.py	Mon Apr 26 22:59:56 2021 +0200
@@ -23,7 +23,7 @@
 # Whitelist of modules that symbols can be directly imported from.
 allowsymbolimports = (
     '__future__',
-    'bzrlib',
+    'breezy',
     'hgclient',
     'mercurial',
     'mercurial.hgweb.common',