Remove/patch unreproducible config data.

diff --git a/configure b/configure
index eb9f346..ebab94d 100755
--- a/configure
+++ b/configure
@@ -23163,7 +23163,7 @@ H4_VERSION="`cut -d' ' -f3 $srcdir/README.txt | head -1`"
 
 
 ## Configuration date
- CONFIG_DATE="`date`"
+CONFIG_DATE=`date -u -d "@$SOURCE_DATE_EPOCH"`
 
 ## User doing the configuration
  CONFIG_USER="`whoami`@`hostname`"
diff --git a/libhdf4.settings.in b/libhdf4.settings.in
index 1d9bbb9..4180d72 100644
--- a/libhdf4.settings.in
+++ b/libhdf4.settings.in
@@ -5,10 +5,10 @@ General Information:
 -------------------
 		   HDF4 Version: @H4_VERSION@
 		  Configured on: @CONFIG_DATE@
-		  Configured by: @CONFIG_USER@
+		  Configured by: guix
 		 Configure mode: @CONFIG_MODE@
-		    Host system: @host_cpu@-@host_vendor@-@host_os@
-              Uname information: @UNAME_INFO@
+		    Host system: guix
+              Uname information: guix
 		      Libraries: @STATIC_SHARED@
 	     Installation point: @prefix@
 
-- 
2.10.0
ref='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=6db5787120d5b571836a46ab8e1abc92d1b0ef8d'>refs</a><a class='active' href='/guix/log/NEWS'>log</a><a href='/guix/tree/NEWS?id=6db5787120d5b571836a46ab8e1abc92d1b0ef8d'>tree</a><a href='/guix/commit/NEWS?id=6db5787120d5b571836a46ab8e1abc92d1b0ef8d'>commit</a><a href='/guix/diff/NEWS?id=6db5787120d5b571836a46ab8e1abc92d1b0ef8d'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/NEWS'>
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<div class='path'>path: <a href='/guix/log/?id=6db5787120d5b571836a46ab8e1abc92d1b0ef8d'>root</a>/<a href='/guix/log/NEWS?id=6db5787120d5b571836a46ab8e1abc92d1b0ef8d'>NEWS</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/NEWS?id=6db5787120d5b571836a46ab8e1abc92d1b0ef8d&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-11-23 10:24:28 +0100'>2021-11-23</span></td><td><a href='/guix/commit/NEWS?id=daf7b5ecef8de0e536ffd8d2957f022d010767a8'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-09-23 20:02:23 +0200'>2021-09-23</span></td><td><a href='/guix/commit/NEWS?id=ff775440218c4f576d51aa01ce419b1fb786170a'>Update NEWS.</a><span class='msg-avail'>...<span class='msg-tooltip'>* NEWS (Distribution): Note new fsck.* arguments and XFS support.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-09-18 23:08:32 +0200'>2021-09-18</span></td><td><a href='/guix/commit/NEWS?id=eb6593cec4b0cedef44bf156e2e6727ead82006c'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-07-07 23:54:20 -0400'>2021-07-07</span></td><td><a href='/guix/commit/NEWS?id=4cbe0127a668cbcc64087c5d311308b59d39b104'>guix-install.sh: Prompt for configuring substitutes discovery.</a><span class='msg-avail'>...<span class='msg-tooltip'>Also ensure prompt_yes_no always print the message with a trailing space,
which is more pleasing to the eye.

* etc/guix-daemon.conf.in &lt;--discover=no&gt;: New guix-daemon option.
* etc/guix-daemon.service.in: Likewise.
* etc/init.d/guix-daemon.in: Likewise.
* etc/openrc/guix-daemon.in: Likewise.
* etc/guix-install.sh (configure_substitute_discovery): New procedure.
(sys_enable_guix_daemon): Ask the user whether automatic substitute discovery
should be enabled.  Set the '--discover' argument accordingly.
(prompt_yes_no): Add a trailing space to the message.
(sys_authorize_build_farms): Remove trailing space from the message argument.
* NEWS (Distribution): Add news.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-06-29 14:53:21 -0400'>2021-06-29</span></td><td><a href='/guix/commit/NEWS?id=82daab42811a2e3c7684ebdf12af75ff0fa67b99'>pack: Add support for the deb format.</a><span class='msg-avail'>...<span class='msg-tooltip'>* .dir-locals.el (scheme-mode)[gexp-&gt;derivation]: Define indentation rule.
* guix/scripts/pack.scm (debian-archive): New procedure.
(%formats): Register the new deb format.
(show-formats): Add it to the usage string.
* tests/pack.scm (%ar-bootstrap): New variable.
(deb archive with symlinks): New test.
* doc/guix.texi (Invoking guix pack): Document it.
* NEWS: Add news entry.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-05-10 13:48:30 -0400'>2021-05-10</span></td><td><a href='/guix/commit/NEWS?id=80dc6ad4a89b68b5e837fc22c9b1322b86527bef'>Update NEWS.</a></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-05-10 11:21:02 -0400'>2021-05-10</span></td><td><a href='/guix/commit/NEWS?id=7418a200742768d21b567916b25e4d3351472230'>Update NEWS.</a></td><td>Leo Famulari</td></tr>
<tr><td><span title='2021-05-10 11:42:03 +0200'>2021-05-10</span></td><td><a href='/guix/commit/NEWS?id=3a0fcaa0fe721792d1543e863c3fba805376bdac'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-05-04 16:57:05 +0200'>2021-05-04</span></td><td><a href='/guix/commit/NEWS?id=b37ab28401c55adbb8e36ea2931849636752524d'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-11-22 20:27:28 +0100'>2020-11-22</span></td><td><a href='/guix/commit/NEWS?id=a099685659b4bfa6b3218f84953cbb7ff9e88063'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-11-13 09:13:56 +0100'>2020-11-13</span></td><td><a href='/guix/commit/NEWS?id=1e272d42f6217b70c9801b93e46b144e9ab27664'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-11-09 23:27:09 +0100'>2020-11-09</span></td><td><a href='/guix/commit/NEWS?id=b51da3ccef74e5842b87e39eea839e36831e844e'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-11-07 19:36:10 +0100'>2020-11-07</span></td><td><a href='/guix/commit/NEWS?id=afa77bd2287f303aefdd00193309ccf57f6dcd93'>Update NEWS.</a></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2020-11-07 16:14:03 +0100'>2020-11-07</span></td><td><a href='/guix/commit/NEWS?id=e8b9b0fae076a86e2be1dcb87b666d4490bac0aa'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-11-05 23:27:22 +0100'>2020-11-05</span></td><td><a href='/guix/commit/NEWS?id=51916455d0bb283489162ef84afc8145b28b012c'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>