Added the ability to create a read-only ethereal, i.e., one that

Added the ability to create a read-only ethereal, i.e., one that
doesn't link with libpcap, so no packet captures can be made. The
"--disable-pcap" option has been added to the configure script. Docs
have been updated. And the string buffer size in the simple_dialog()
has been doubled so that Johan's e-mail address in the "About" dialogue
window doesn't get chopped off.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@351 f5534014-38df-0310-8fa8-9805f1628bb7