configure script. don't "clean" it and remove it from .cvsignore.
Note: to avoid problems in developer dirs, we nuke the file in
buildconf.sh for now; we'll stop doing that at some future time.
[idea from ASF]
* look for glibtoolize, in addition to libtoolize (e.g. the MacOS X platform
names it differently). [patch from ASF]
* conftools/missing is not needed
* use "exit 0" in buildconf.sh to help calling scripts. [patch from ASF]
* minor output cleanup in "make clean"