config: add a new [command-templates] section for templates defined by hg The existing `[templates]` section lets the user define their own keys and then refer to them on the command line with `-T`. There are many cases where hg wants to use a user-defined template with a given name, such as `ui.logtemplate` and `ui.mergemarkertemplate`. This patch starts moving such configs in a common section by moving `ui.logtemplate` to `command-templates.log` (with an alias from the old name, of course). Differential Revision: https://phab.mercurial-scm.org/D9245

--- a/tests/test-template-map.t	Mon Oct 26 10:08:22 2020 -0700
+++ b/tests/test-template-map.t	Fri Oct 23 10:56:18 2020 -0700
@@ -48,8 +48,9 @@
 
 Make sure user/global hgrc does not affect tests
 
+  $ echo '[command-templates]' > .hg/hgrc
+  $ echo 'log =' >> .hg/hgrc
   $ echo '[ui]' > .hg/hgrc
-  $ echo 'logtemplate =' >> .hg/hgrc
   $ echo 'style =' >> .hg/hgrc
 
 Add some simple styles to settings