Bug#348384: xterm: please restore default charClass

[Andrew Pimlott <andrew@pimlott.net>]

I want to strongly second the opinion of Kirk Hilliard
<kirk@debian.org>.  I find that in fact the new behavior makes it harder
to select URLs!  When I read mail in mutt, the URL often wraps to a new
line and in preceded by a '+' character.  Double-clicking the URL
selects the '+', so I must carefully select the start and end of the URL
by character.  With the old settings, I could double-click anywhere in
HTTP and drag to the end by word (which is also useful to grab only part
of the URL, by the way).  The issue repeats itself in many other
situations.  For example, I used to be able to get a bug number out of a
Debian changelog by double-clicking; now, I get "#345477," instead.
When I want a word from a document, I end up getting the surrounding
punctuation as well.  And so on.

Moreover, xterm has had its default selection behavior forever, and with
such a venerable program, the Debian package should be conservative in
changing defaults.  I was quite shocked by the new behavior.  I even
took care to keep my old xterm windows open so that I could enjoy the
historical behavior until I had time to figure out what was going on!

Last, if you are going to keep the change, you should not only mention
it in README.Debian, but update the man page, which gives the default.
In my view, the burden of maintaining the updated man page is reason
enough not to make this change. ;-)

Andrew