profiling: allow configuring minimum display threshold for hotpath statprof.display_hotpath() accepts a "limit" function to choose the minimum threshold for samples to display. The default is 0.05, which means you don't need individual items contributing less than 5%. I had a need to adjust this threshold. We already have a config option for it. So let's reuse it. check-config.py doesn't like having multiple defaults for the ui.configwith() calls. The behavior is obviously correct. I'm not sure if it is worth teaching check-config.py how to ignore this. So I've just accepted the new output.

--- a/mercurial/help/config.txt	Thu Jun 15 11:04:46 2017 -0700
+++ b/mercurial/help/config.txt	Thu Jun 15 11:10:51 2017 -0700
@@ -1580,6 +1580,7 @@
 
     Only used by the ``stat`` profiler.
 
+    For the ``hotpath`` format, default is ``0.05``.
     For the ``chrome`` format, default is ``0.005``.
 
     The option is unused on other formats.