Unconditionally disable network check for new versions (from Fedora).

diff -u /home/dlove/rpmbuild/BUILD/cube-4.3.4/src/GUI-qt/display/VersionCheckWidget.cpp\~ /home/dlove/rpmbuild/BUILD/cube-4.3.4/src/GUI-qt/display/VersionCheckWidget.cpp
--- cube-4.3.4/src/GUI-qt/display/VersionCheckWidget.cpp~	2016-04-03 00:05:37.942066948 +0100
+++ cube-4.3.4/src/GUI-qt/display/VersionCheckWidget.cpp	2016-05-06 17:16:31.648143908 +0100
@@ -52,7 +52,8 @@
     url              = QUrl( UPDATE_CHECK_URL );
     download         = NULL;
     update_Available = false;
-    bool no_http = env_str2bool( getenv( "CUBE_DISABLE_HTTP_DOCS" ) );
+    // bool no_http = env_str2bool( getenv( "CUBE_DISABLE_HTTP_DOCS" ) );
+    bool no_http = true;
     if ( !no_http )
     {
         updateDescription =   tr( "Check for update is not performed yet." );

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<tr><td><span title='2018-11-14 21:34:08 +0100'>2018-11-14</span></td><td><a href='/guix/commit/nix?id=0fe1fba4af41f267c4bb2c006fb37f42422ab703'>daemon: Install 'authenticate' script under LIBEXECDIR/guix.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-10-15 22:40:35 +0200'>2018-10-15</span></td><td><a href='/guix/commit/nix?id=6ef61cc4c30e94acbd7437f19c893f63a7112267'>daemon: Support multiplexed build output.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-10-02 23:08:30 +0200'>2018-10-02</span></td><td><a href='/guix/commit/nix?id=c577ac194afb4c9df76f9955aeb6118aafac6c34'>daemon: Remove unused 'Settings' fields.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-10-02 23:08:30 +0200'>2018-10-02</span></td><td><a href='/guix/commit/nix?id=7eca7892014d173ff523417138b90aeff5b7dec1'>daemon: Remove "case hack" for nars.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-09-27 23:21:53 +0200'>2018-09-27</span></td><td><a href='/guix/commit/nix?id=240a9c69a6064544a616acc521c993542c364948'>perform-download: Optionally report a "download-progress" trace.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-09-27 23:21:53 +0200'>2018-09-27</span></td><td><a href='/guix/commit/nix?id=dc0f74e5fc26977a3ee6c4f2aa74a141f4359982'>Add (guix status) and use it for pretty colored output.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-06-22 10:23:31 +0200'>2018-06-22</span></td><td><a href='/guix/commit/nix?id=de30f71a099203ecb25f560aa896e9c1a86febc6'>build: Remove leftover reference to nix/libstore/schema.sql.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-06-14 11:17:00 +0200'>2018-06-14</span></td><td><a href='/guix/commit/nix?id=ea0a06cee2ba05451f94714a4f913db02efbe92c'>Remove 'guix-register' and its traces.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-06-14 11:16:58 +0200'>2018-06-14</span></td><td><a href='/guix/commit/nix?id=3931c76154d4f418d5ea9acc5e47bf911d371c24'>database: 'with-database' can now initialize new databases.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-06-08 15:23:39 +0200'>2018-06-08</span></td><td><a href='/guix/commit/nix?id=751164bca1030dfd14f9fa7508c03eb4b41173e4'>build: Do not add all of $(BUILT_SOURCES) to $(CLEANFILES).</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-05-17 20:37:27 +0300'>2018-05-17</span></td><td><a href='/guix/commit/nix?id=162825f9653f1ba050e40f0ca96d1eb3491a9207'>daemon: Allow building for armhf-linux on aarch64-linux.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2018-04-19 19:06:26 +0200'>2018-04-19</span></td><td><a href='/guix/commit/nix?id=5cefb13ddd4d51a63a387e74c138035b7b8b8537'>guix-daemon: Disable garbage collection for remote connections.</a><span class='msg-avail'>...</span></td><td>Roel Janssen</td></tr>
<tr><td><span title='2018-03-30 23:42:07 +0200'>2018-03-30</span></td><td><a href='/guix/commit/nix?id=602a148650809da3c2356e4429f4b8160a72843b'>daemon: Remove unused schema upgrade code.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-03-30 23:42:07 +0200'>2018-03-30</span></td><td><a href='/guix/commit/nix?id=c7589cce8d3f9fcb7769e424f341dba8fb3545d0'>daemon: Remove dead code.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>