configure.in uses deprecated autoconf test for gnutls detection

This issue was migrated from bug 3627 in our old bug tracker.

Original bug information:

Reporter: Andreas Metzler
Status: RESOLVED FIXED
Product: Wireshark
Component: Build process
OS: All
Platform: Other
Version: 1.2.0

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information