chgserver: spawn new process if schemes change The schemes extension updates hg.schemes table. It's technically possible for hg.repository() to look for e.g. ui.schemes instead of depending on module-local table, but I don't think the change would make much sense since [schemes] is usually specified in ~/.hgrc and thus it can be considered static data.

--- a/mercurial/chgserver.py	Mon Feb 10 15:52:52 2020 -0800
+++ b/mercurial/chgserver.py	Tue Feb 11 19:53:56 2020 +0900
@@ -83,6 +83,7 @@
     b'eol',  # uses setconfig('eol', ...)
     b'extdiff',  # uisetup will register new commands
     b'extensions',
+    b'schemes',  # extsetup will update global hg.schemes
 ]
 
 _configsectionitems = [