sequence, otherwise

operator.indexOf([4, 3, 2, 1], 9) would raise a SystemError!

Note: it might be wise to double check all these functions.  I haven't
done that yet.

options.  Also added two: %n and %t (newline and tab character).

triggering a bogus TestFailed exception.

Watch it, Barry! :-)

(py-delete-char): funcall py-delete-function.

style corrections, I presume), found by Jack.  Added warning that this
has not been tested (Jack could only compile and link it).

This is needed because if a configure option has " as its value,
it will be rendered as {"}; after stripping one level of quoting it's
just ", on which splitlist will barf.

checking nits.

(testall.py): added test_thread to the list of regression tests.

	<leonard@dstc.edu.au>; allows hyphen and period in the middle
	of attribute names.  Still not allowed as first character;
	as first character these are illegal in the Reference Concrete
	Syntax, and we've not identified any use of these characters as
	the first char in an attribute name in deployment on the web.