commit a0722409bcb980ecdab8330d4c716a73c9fcb489
author Daniel P. Berrangé <berrange@redhat.com> Wed Jul 18 11:55:05 2018 +0100
committer Daniel P. Berrangé <berrange@redhat.com> Fri Oct 19 12:26:57 2018 +0100
tree c210c48beb7d0e8f735cfe904b8bc253c43fcc85
parent 2ec24af2379e331d062a6fc1cda65bc262c7c17b

crypto: require gnutls >= 3.1.18 for building QEMU

gnutls 3.0.0 was released in 2011 and all the distros that are build
target platforms for QEMU [1] include it:

  RHEL-7: 3.1.18
  Debian (Stretch): 3.5.8
  Debian (Jessie): 3.3.8
  OpenBSD (ports): 3.5.18
  FreeBSD (ports): 3.5.18
  OpenSUSE Leap 15: 3.6.2
  Ubuntu (Xenial): 3.4.10
  macOS (Homebrew): 3.5.19

Based on this, it is reasonable to require gnutls >= 3.1.18 in QEMU
which allows for all conditional version checks in the code to be
removed.

[1] https://qemu.weilnetz.de/doc/qemu-doc.html#Supported-build-platforms

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>