LOGCXX-257 and 0.10.0 RC 3

Had to rewrite a substantial bit of log4cxx in the release
process,  
but I didn't see another way of getting
TelnetAppender::close() not to  
hang on Unix.  I'm going to cut 0.10.0 RC3 later today after
I get  
some sleep.  I would appreciate any feedback on the new
code,  
particularly any testing of network based appenders.  The
unit tests  
pass on Mac OS/X, Ubuntu 6.06 and WinXP and I've done quick
sanity  
testing of TelnetAppender on Mac OS/X.

The timeline is pretty quick for 0.10.0.  For reasons, I
can't go into  
here (but I have on privatelogging.apache.org), a
log4cxx 0.10.0  
release must either occur before next Thursday (April 3rd)
or will  
have to wait until April 17th or so.  That is still more
than the  
required 72 hours, but not all that much more.  A timely
reviews and  
feedback of 0.10.0 RC3 when it becomes available will be
crucial in  
trying to meet that deadline.  I don't expect any code
changes between  
before cutting the release candidate, but there will be some
minor  
cosmetic changes.