hgrc: tweak my settings along the lines of https://octobus.net/blog/2020-11-26-modern-mercurial.html

ops/nixos/lib/home-manager/hgrc

@@ -7,6 +7,16 @@ username = Luke Granger-Brown <hg@lukegb.com>
 interface = curses
 tweakdefaults = True
 merge = internal:merge3
+mergemarkers = detailed
+
+[commands]
+push.require-revs = true
+
+[paths]
+default:pushrev = .
+
+[phases]
+publish = false
 
 [alias]
 log = log --template lukegblogshort --graph
@@ -60,3 +70,8 @@ evolve =
 topic =
 git =
 purge =
+absorb =
+
+[experimental]
+topic-mode = enforce
+evolution = all