Don't encode the current timestamp.

This affects the output of `perl -V`, specifically the message "Compiled
at [...]".

The 'cf_time' and 'cf_by' values show up in 'config.h' and
in 'Config_heavy.pl'.

Use the output of 'uname -s' instead of 'uname -a' to avoid recording
the kernel version ('uname -o' leads to directory names like
'x86_64-gnulinux' instead of 'x86_64-linux', which might cause breakage
down the road.)

diff --git a/perl.c b/perl.c
index 228a0d8..ed38313 100644
--- a/perl.c
+++ b/perl.c
@@ -1825,6 +1825,7 @@ S_Internals_V(pTHX_ CV *cv)
     PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
 			      sizeof(non_bincompat_options) - 1, SVs_TEMP));
 
+#define PERL_BUILD_DATE "Jan  1 1970 00:00:00"
 #ifndef PERL_BUILD_DATE
 #  ifdef __DATE__
 #    ifdef __TIME__

--- a/Configure	1970-01-01 01:00:00.000000000 +0100
+++ b/Configure	2016-10-01 14:47:20.017319739 +0200
@@ -3276,7 +3276,7 @@ $eunicefix tr
 : Try to determine whether config.sh was made on this system
 case "$config_sh" in
 '')
-myuname=`$uname -a 2>/dev/null`
+myuname=`$uname -s 2>/dev/null`
 $test -z "$myuname" && myuname=`hostname 2>/dev/null`
 # Downcase everything to avoid ambiguity.
 # Remove slashes and single quotes so we can use parts of this in
@@ -3845,10 +3845,10 @@
 . ./posthint.sh
 
 : who configured the system
-cf_time=`LC_ALL=C; LANGUAGE=C; export LC_ALL; export LANGUAGE; $date 2>&1`
+cf_time="1970-01-01"
 case "$cf_by" in
 "")
-	cf_by=`(logname) 2>/dev/null`
+	cf_by="guix"
 	case "$cf_by" in
 	"")
 		cf_by=`(whoami) 2>/dev/null`
tion='/guix/log/gnu/packages/vim.scm'>
<input type='hidden' name='id' value='a9585eea7515cd80228ef32684eb6c5a9e2a96da'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=a9585eea7515cd80228ef32684eb6c5a9e2a96da'>root</a>/<a href='/guix/log/gnu?id=a9585eea7515cd80228ef32684eb6c5a9e2a96da'>gnu</a>/<a href='/guix/log/gnu/packages?id=a9585eea7515cd80228ef32684eb6c5a9e2a96da'>packages</a>/<a href='/guix/log/gnu/packages/vim.scm?id=a9585eea7515cd80228ef32684eb6c5a9e2a96da'>vim.scm</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/gnu/packages/vim.scm?id=a9585eea7515cd80228ef32684eb6c5a9e2a96da&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-02-12 16:56:55 +0200'>2023-02-12</span></td><td><a href='/guix/commit/gnu/packages/vim.scm?id=36da1f2804531a28d6f1b7c814b4d3375a553fc1'>gnu: vim: Update to 9.0.1303.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2023-02-09 17:36:23 +0400'>2023-02-09</span></td><td><a href='/guix/commit/gnu/packages/vim.scm?id=ce7d0d689c07a7a6fd11d5d00f0e6c990cb4ee07'>gnu: tree-sitter: Move to its own module.</a><span class='msg-avail'>...</span></td><td>Pierre Langlois</td></tr>
<tr><td><span title='2023-02-07 09:12:37 +0100'>2023-02-07</span></td><td><a href='/guix/commit/gnu/packages/vim.scm?id=7a87298e2fea9aa718c3b3b994c538dc4a6d35dd'>gnu: neovim: Update to 0.8.3.</a><span class='msg-avail'>...</span></td><td>ギャラ</td></tr>
<tr><td><span title='2023-01-10 11:49:13 +0100'>2023-01-10</span></td><td><a href='/guix/commit/gnu/packages/vim.scm?id=7ebeafff15f052cb69758be4792ca2715c7d573d'>gnu: neovim: Update to 0.8.2.</a><span class='msg-avail'>...</span></td><td>Luis Henrique Gomes Higino</td></tr>
<tr><td><span title='2022-12-18 21:44:15 +0200'>2022-12-18</span></td><td><a href='/guix/commit/gnu/packages/vim.scm?id=471c94ae175d1dfe9919b9ac81d31230b765e3a1'>gnu: vim: Update to 9.0.1073.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2022-11-27 12:47:39 +0200'>2022-11-27</span></td><td><a href='/guix/commit/gnu/packages/vim.scm?id=ac8de9eb7e0cea7dbcb2a42c632587536ee62fd7'>gnu: vim: Update to 9.0.0954.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2022-11-17 12:00:32 +0000'>2022-11-17</span></td><td><a href='/guix/commit/gnu/packages/vim.scm?id=7b7e80cf2505940b092deb9caa1b3cf90779ef8e'>gnu: neovim: Update to 0.8.1.</a><span class='msg-avail'>...</span></td><td>ギャラ</td></tr>
<tr><td><span title='2022-11-05 11:40:06 +0100'>2022-11-05</span></td><td><a href='/guix/commit/gnu/packages/vim.scm?id=8139322b8adf4d51badb598b123de600b2ab1682'>gnu: Add python-neovim-remote.</a><span class='msg-avail'>...</span></td><td>ギャラ</td></tr>
<tr><td><span title='2022-10-30 09:57:49 +0200'>2022-10-30</span></td><td><a href='/guix/commit/gnu/packages/vim.scm?id=87727b6dcba4fec8e5e7b75da8c535497834e8f4'>gnu: vim: Update to 9.0.0820.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2022-10-30 09:57:46 +0200'>2022-10-30</span></td><td><a href='/guix/commit/gnu/packages/vim.scm?id=2facc0eb37c26ccf89c0ee1bcab29790a9c910d5'>gnu: vim: Patch another '/bin/sh' shebang.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>