For Dave Ascher's readline extensions.

adjustments.

string

that use parameters.

Allow '=' and '~' in unquoted attribute values.

Added overridable methods handle_starttag(tag, method, attrs) and
handle_endtag(tag, method) so subclasses can decide whether they
really want to call the method (e.g. when suppressing some portion of
the document).

Added support for a number of SGML shortcuts:

        shorthand               full notation
        <tag>...<>...           <tag>...<tag>...
        <tag>...</>             <tag>...</tag>
        <tag/.../               <tag>...</tag>
        <tag1<tag2>             <tag1><tag2>
        </tag1</tag2>           </tag1></tag2>
        </tag1<tag2>            </tag1><tag2>

This required factoring out some common actions and rationalizing the
interface to parse_endtag(), so as to make the code more readable.

Fixed syntax for &entity and &#char references so the trailing
semicolon is optional; removed explicit support for trailing period
(which was a TBL mistake in HTML 0.0).

Generalized the test program.

Tried to speed things up a little.  (More to come after the profile
results are in.)

Fix error recovery: call the end methods popped from the stack instead
of the one that triggers.  (Plus some complications because of the way
HTML extensions are handled in Grail.)

nil.

should stop us from continually updating the .hqx files, at least for
resource files.

current line.

locations for mac libs. The others were re-binhexed for reasons unknown...

(Proxy handling uses <proto>_proxy environment variables by default.)