configure.in:

configure.in:
        Check for libgcrypt 1.1.0 (note: I don't know which version
        is required, so maybe the version number needs to be changed
        for this test to work reliably).

packet-ipsec.c:
        - Replace __USE_LIBGCRYPT__ by HAVE_LIBGCRYPT to follow
          conventions.
        - Warning fixes: signedness in sscanf (%i -> %u)
        - Warning fixes: mixed declaration and code

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@18460 f5534014-38df-0310-8fa8-9805f1628bb7