-Update libtool and libltdl to 2.2.6a.
-Remove devel/libtool15 and devel/libltdl15.
-Fix ports build with libtool22/libltdl22.
-Bump ports that depend on libltdl22 due to shared library version change.
-Explain what to do update in the UPDATING.
It has been tested with GNOME2, XFCE4, KDE3, KDE4 and other many wm/desktop
and applications in the runtime.
With help: marcus and kwm
Pointyhat-exp: a few times by pav
Tested by: pgollucci, "Romain Tartière" <romain@blogreen.org>, and
a few MarcusCom CVS users. Also, I might have missed a few.
Repocopy by: marcus
Approved by: portmgr
