crypto: bump min gnutls to 3.5.18, dropping RHEL-7 support

It has been over two years since RHEL-8 was released, and thus per the
platform build policy, we no longer need to support RHEL-7 as a build
target. This lets us increment the minimum required gnutls version

Per repology, current shipping versions are:

             RHEL-8: 3.6.14
      Debian Buster: 3.6.7
 openSUSE Leap 15.2: 3.6.7
   Ubuntu LTS 18.04: 3.5.18
   Ubuntu LTS 20.04: 3.6.13
            FreeBSD: 3.6.15
          Fedora 33: 3.6.16
          Fedora 34: 3.7.1
            OpenBSD: 3.6.15
     macOS HomeBrew: 3.6.15

Ubuntu LTS 18.04 has the oldest version and so 3.5.18 is the new minimum.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210514120415.1368922-7-berrange@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Willian Rampazzo <willianr@redhat.com>
[thuth: rebased to use .gitlab-ci.d/buildtest.yml]
Signed-off-by: Thomas Huth <thuth@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/configure b/configure
index fb8c5187e8..b36df40c27 100755
--- a/configure
+++ b/configure
@@ -2801,7 +2801,7 @@ fi
 
 if test "$gnutls" != "no"; then
     pass="no"
-    if $pkg_config --exists "gnutls >= 3.1.18"; then
+    if $pkg_config --exists "gnutls >= 3.5.18"; then
         gnutls_cflags=$($pkg_config --cflags gnutls)
         gnutls_libs=$($pkg_config --libs gnutls)
         # Packaging for the static libraries is not always correct.