show: use the new stack definition for show stack
Now that we have a common stack definition, use it in the hg show stack
command.
Differential Revision: https://phab.mercurial-scm.org/D2397
# This config file points Mercurial at the system-wide certificate
# store from the ca-certificates package.
[web]
cacerts = /etc/ssl/certs/ca-certificates.crt