Fix for <https://nvd.nist.gov/vuln/detail?vulnId=CVE-2015-8560>.

--- a/util.c	2015-10-30 15:45:03 +0000
+++ b/util.c	2015-12-12 23:27:21 +0000
@@ -31,7 +31,7 @@
 #include <assert.h>
 
 
-const char* shellescapes = "|<>&!$\'\"`#*?()[]{}";
+const char* shellescapes = "|;<>&!$\'\"`#*?()[]{}";
 
 const char * temp_dir()
 {
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<tr><td><span title='2024-01-22 13:24:20 -0500'>2024-01-22</span></td><td><a href='/guix/commit/gnu/tests/base.scm?id=10a193596368443f441077525ebbddf787d91e4b'>gnu: Remove linux-libre 4.14.</a><span class='msg-avail'>...</span></td><td>Wilko Meyer</td></tr>
<tr><td><span title='2023-04-21 16:16:38 +0200'>2023-04-21</span></td><td><a href='/guix/commit/gnu/tests/base.scm?id=fb32e226ce3d3cd9bf12989850b2dd719266d583'>tests: Use the client 'start-service' procedure.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-03-03 17:55:35 +0100'>2023-03-03</span></td><td><a href='/guix/commit/gnu/tests/base.scm?id=2799ad44234be675f018115f99be98d2c9fd565d'>services: dbus: Deprecate 'dbus-service' procedure.</a><span class='msg-avail'>...</span></td><td>Bruno Victal</td></tr>
<tr><td><span title='2023-01-08 15:15:09 -0500'>2023-01-08</span></td><td><a href='/guix/commit/gnu/tests/base.scm?id=064c5b7e450f9f6d55cfcd0ec2bc9e96ee0b2958'>gnu: Remove linux-libre 4.9.</a><span class='msg-avail'>...</span></td><td>Leo Famulari</td></tr>