tests/test-check-execute.t

run-tests: stop allocating HGPORT3+HGPORT4

The only consumer was test-treemanifest.t, which has been fixed.

In general, you should be able to use killdaemons.py to recycle
ports instead of going over 3 ports (HGPORT, HGPORT1, HGPORT2).

In the future, if you want to add a port, be sure to change
portneeded in _getport.

#require test-repo execbit

  $ cd "`dirname "$TESTDIR"`"

look for python scripts without the execute bit

  $ hg files 'set:**.py and not exec() and grep(r"^#!.*?python")'
  [1]

look for python scripts with execute bit but not shebang

  $ hg files 'set:**.py and exec() and not grep(r"^#!.*?python")'
  [1]

look for shell scripts with execute bit but not shebang

  $ hg files 'set:**.sh and exec() and not grep(r"^#!.*(ba)?sh")'
  [1]

look for non scripts with no shebang

  $ hg files 'set:exec() and not **.sh and not **.py and not grep(r"^#!")'
  [1]