Fix CVE-2014-2524:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2524
http://lists.gnu.org/archive/html/bug-readline/2014-03/msg00057.html

Patch copied from:
https://ftp.gnu.org/gnu/readline/readline-6.3-patches/readline63-003

			   READLINE PATCH REPORT
			   =====================

Readline-Release: 6.3
Patch-ID: readline63-003

Bug-Reported-by:
Bug-Reference-ID:
Bug-Reference-URL:

Bug-Description:

There are debugging functions in the readline release that are theoretically
exploitable as security problems.  They are not public functions, but have
global linkage.

Patch (apply with `patch -p0'):

*** ../readline-6.3/util.c	2013-09-02 13:36:12.000000000 -0400
--- util.c	2014-03-20 10:25:53.000000000 -0400
***************
*** 477,480 ****
--- 479,483 ----
  }
  
+ #if defined (DEBUG)
  #if defined (USE_VARARGS)
  static FILE *_rl_tracefp;
***************
*** 539,542 ****
--- 542,546 ----
  }
  #endif
+ #endif /* DEBUG */
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<tr><td><span title='2021-01-31 09:22:50 +0100'>2021-01-31</span></td><td><a href='/guix/commit/gnu/packages/telegram.scm?id=edfbb1d2d1391b96af3b339cdb01df50298ec7ba'>gnu: Add telegram-desktop.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/telegram.scm (telegram-desktop): New variable.

Signed-off-by: Leo Prikler &lt;leo.prikler@student.tugraz.at&gt;
</span></span></td><td>Raghav Gururajan</td></tr>
<tr><td><span title='2021-01-31 09:22:50 +0100'>2021-01-31</span></td><td><a href='/guix/commit/gnu/packages/telegram.scm?id=27fa48443aa684bcb8f7604c4bae80c436052dcc'>gnu: Add libtgvoip-for-telegram-desktop.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/telegram.scm (libtgvoip-for-telegram-desktop): New variable.

Signed-off-by: Leo Prikler &lt;leo.prikler@student.tugraz.at&gt;
</span></span></td><td>Raghav Gururajan</td></tr>
<tr><td><span title='2021-01-31 09:22:50 +0100'>2021-01-31</span></td><td><a href='/guix/commit/gnu/packages/telegram.scm?id=cda5fb481c404ca64d7e9cdda9f26c9ea36e216e'>gnu: Add rlottie-for-telegram-desktop.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/telegram.scm (rlottie-for-telegram-desktop): New variable.

Signed-off-by: Leo Prikler &lt;leo.prikler@student.tugraz.at&gt;
</span></span></td><td>Raghav Gururajan</td></tr>
<tr><td><span title='2021-01-31 09:22:50 +0100'>2021-01-31</span></td><td><a href='/guix/commit/gnu/packages/telegram.scm?id=a84399eddfd3e55eedcef0283f2fcdff80f504b7'>gnu: Add webrtc-for-telegram-desktop.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/telegram.scm: New module.
(webrtc-for-telegram-desktop): New variable.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

Signed-off-by: Leo Prikler &lt;leo.prikler@student.tugraz.at&gt;
</span></span></td><td>Raghav Gururajan</td></tr>