gnu: certbot, python-acme: Update to 0.18.2.

* gnu/packages/tls.scm (certbot, python-acme): Update to 0.18.2.
* gnu/packages/patches/python-acme-dont-use-openssl-rand.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.

gnu/local.mk

@@ -553,7 +553,6 @@ dist_patch_DATA =						\
   %D%/packages/patches/ceph-disable-unittest-throttle.patch	\
   %D%/packages/patches/ceph-skip-collect-sys-info-test.patch	\
   %D%/packages/patches/ceph-skip-unittest_blockdev.patch	\
-  %D%/packages/patches/python-acme-dont-use-openssl-rand.patch	\
   %D%/packages/patches/chicken-CVE-2017-6949.patch		\
   %D%/packages/patches/chicken-CVE-2017-11343.patch		\
   %D%/packages/patches/chmlib-inttypes.patch			\

gnu/packages/patches/python-acme-dont-use-openssl-rand.patch

@@ -1,28 +0,0 @@
-Fix build with PyOpenSSL > 17.2.0.
-
-See <https://github.com/certbot/certbot/issues/5111>.
-
-Patch copied from upstream source repository:
-https://github.com/certbot/certbot/commit/f6be07da74c664b57ac8c053585f919c79f9af44
-
-diff --git a/acme/crypto_util.py b/acme/crypto_util.py
-index de15284c03..b8fba03488 100644
---- a/acme/crypto_util.py
-+++ b/acme/crypto_util.py
-@@ -2,6 +2,7 @@
- import binascii
- import contextlib
- import logging
-+import os
- import re
- import socket
- import sys
-@@ -243,7 +244,7 @@ def gen_ss_cert(key, domains, not_before=None,
-     """
-     assert domains, "Must provide one or more hostnames for the cert."
-     cert = OpenSSL.crypto.X509()
--    cert.set_serial_number(int(binascii.hexlify(OpenSSL.rand.bytes(16)), 16))
-+    cert.set_serial_number(int(binascii.hexlify(os.urandom(16)), 16))
-     cert.set_version(2)
- 
-     extensions = [

gnu/packages/tls.scm

@@ -486,14 +486,13 @@ netcat implementation that supports TLS.")
   (package
     (name "python-acme")
     ;; Remember to update the hash of certbot when updating python-acme.
-    (version "0.18.1")
+    (version "0.18.2")
     (source (origin
               (method url-fetch)
               (uri (pypi-uri "acme" version))
-              (patches (search-patches "python-acme-dont-use-openssl-rand.patch"))
               (sha256
                (base32
-                "0ry6vhfkhds28sg232hngwfnkqihsxv9r8w92c6nz45r7w56qk0y"))))
+                "1xiy8m7501g5l9kpdmyvyz72nfnl72l19qkrf76fyvby7adzm3ki"))))
     (build-system python-build-system)
     (arguments
      `(#:phases
@@ -541,7 +540,7 @@ netcat implementation that supports TLS.")
               (uri (pypi-uri name version))
               (sha256
                (base32
-                "0k3bqfkjxyg0qivs4a6iz6gyqx8li4hgn8m268r72lxgq46ay2mf"))))
+                "16lw4n7kwnkvh9sz2f97c7ad1wwp33mg5fc332lpy5n17zpfc8h1"))))
     (build-system python-build-system)
     (arguments
      `(,@(substitute-keyword-arguments (package-arguments python-acme)