[or-cvs] Use autoconf to enable largefile support where necessary. U...

[Nick Mathewson]

Update of /home/or/cvsroot
In directory moria.mit.edu:/tmp/cvs-serv20958

Modified Files:
	configure.in 
Log Message:
Use autoconf to enable largefile support where necessary. Use ftello where available, since ftell can fail at 2GB.