update libtool support to version 2.4.2
2529. [cleanup] Upgrade libtool to silence complaints from recent version of autoconf. [RT #18657]
2054. [port] freebsd: do not explicitly link against -lpthread. [RT #16170]
1779. [port] OSF 5.1: libtool didn't handle -pthread correctly. Redo w/ fix from generic fix from libtool maintainer.
1780. [bug] Update libtool to 1.5.10.
1779. [port] OSF 5.1: libtool didn't handle -pthread correctly.
1573. [port] linux: update to libtool 1.5.2 so that "make install DESTDIR=/xx" works with "configure --with-libtool". [RT #9941]
1524. [port] AIX needs to be able to resolve all symbols when creating shared libraries (--with-libtool).
1008. [port] libtool.m4, ltmain.sh from libtool-1.4.2
836. [func] Upgraded libtool to 1.4.
520. [bug] Upgraded libtool to 1.3.5, which allows shared library builds to work on AIX (and possibly others).
Trailing whitespace trimmed. Perhaps running "perl util/spacewhack.pl in your own CVS tree will help minimize CVS conflicts. Maybe not. Blame Graff for getting me to trim all trailing whitespace.
update to libtool 1.3.3
shared library support