log: migrate to modern pager API

hgext/pager.py

@@ -110,4 +110,4 b' def uisetup(ui):'
         extensions.wrapfunction(dispatch, '_runcommand', pagecmd)
     extensions.afterloaded('color', afterloaded)
 
-attended = ['glog', 'log', 'qdiff']
+attended = ['qdiff']

mercurial/commands.py

@@ -3435,6 +3435,7 b' def log(ui, repo, *pats, **opts):'
             endrev = scmutil.revrange(repo, opts.get('rev')).max() + 1
         getrenamed = templatekw.getrenamedfn(repo, endrev=endrev)
 
+    ui.pager('log')
     displayer = cmdutil.show_changeset(ui, repo, opts, buffered=True)
     for rev in revs:
         if count == limit: