configitems: register the test 'logtoprocess.foo' config

tests/test-logtoprocess.t

@@ -1,80 +1,85 b''
 #require no-windows
 
 ATTENTION: logtoprocess runs commands asynchronously. Be sure to append "| cat"
 to hg commands, to wait for the output, if you want to test its output.
 Otherwise the test will be flaky.
 
 Test if logtoprocess correctly captures command-related log calls.
 
   $ hg init
   $ cat > $TESTTMP/foocommand.py << EOF
   > from __future__ import absolute_import
   > from mercurial import registrar
   > cmdtable = {}
   > command = registrar.command(cmdtable)
+  > configtable = {}
+  > configitem = registrar.configitem(configtable)
+  > configitem('logtoprocess', 'foo',
+  >     default=None,
+  > )
   > @command(b'foo', [])
   > def foo(ui, repo):
   >     ui.log('foo', 'a message: %(bar)s\n', bar='spam')
   > EOF
   $ cp $HGRCPATH $HGRCPATH.bak
   $ cat >> $HGRCPATH << EOF
   > [extensions]
   > logtoprocess=
   > foocommand=$TESTTMP/foocommand.py
   > [logtoprocess]
   > command=echo 'logtoprocess command output:';
   >     echo "\$EVENT";
   >     echo "\$MSG1";
   >     echo "\$MSG2"
   > commandfinish=echo 'logtoprocess commandfinish output:';
   >     echo "\$EVENT";
   >     echo "\$MSG1";
   >     echo "\$MSG2";
   >     echo "\$MSG3"
   > foo=echo 'logtoprocess foo output:';
   >     echo "\$EVENT";
   >     echo "\$MSG1";
   >     echo "\$OPT_BAR"
   > EOF
 
 Running a command triggers both a ui.log('command') and a
 ui.log('commandfinish') call. The foo command also uses ui.log.
 
 Use sort to avoid ordering issues between the various processes we spawn:
   $ hg foo | cat | sort
   
   
   
    (chg !)
   0
   a message: spam
   command
   command (chg !)
   commandfinish
   foo
   foo
   foo
   foo
   foo exited 0 after * seconds (glob)
   logtoprocess command output:
   logtoprocess command output: (chg !)
   logtoprocess commandfinish output:
   logtoprocess foo output:
   serve --cmdserver chgunix * (glob) (chg !)
   serve --cmdserver chgunix * (glob) (chg !)
   spam
 
 Confirm that logging blocked time catches stdio properly:
   $ cp $HGRCPATH.bak $HGRCPATH
   $ cat >> $HGRCPATH << EOF
   > [extensions]
   > logtoprocess=
   > pager=
   > [logtoprocess]
   > uiblocked=echo "\$EVENT stdio \$OPT_STDIO_BLOCKED ms command \$OPT_COMMAND_DURATION ms"
   > [ui]
   > logblockedtimes=True
   > EOF
 
   $ hg log | cat
   uiblocked stdio [0-9]+.[0-9]* ms command [0-9]+.[0-9]* ms (re)