patches: Add fix for pymilter build

patches/321446.patch

@@ -0,0 +1,48 @@
+diff --git a/pkgs/development/python-modules/pymilter/default.nix b/pkgs/development/python-modules/pymilter/default.nix
+index 32b7cfcc9bbcd6..6d9338dbc1b90e 100644
+--- a/pkgs/development/python-modules/pymilter/default.nix
++++ b/pkgs/development/python-modules/pymilter/default.nix
+@@ -3,9 +3,8 @@
+   python,
+   buildPythonPackage,
+   fetchFromGitHub,
+-  fetchpatch,
+   libmilter,
+-  bsddb3,
++  berkeleydb,
+   pydns,
+   iana-etc,
+   libredirect,
+@@ -14,29 +13,22 @@
+ 
+ buildPythonPackage rec {
+   pname = "pymilter";
+-  version = "1.0.5";
++  version = "1.0.6";
+   format = "setuptools";
+ 
+   src = fetchFromGitHub {
+     owner = "sdgathman";
+     repo = pname;
+     rev = "${pname}-${version}";
+-    hash = "sha256-gZUWEDVZfDRiOOdG3lpiQldHxm/93l8qYVOHOEpHhzQ=";
++    hash = "sha256-plaWXwDAIsVzEtrabZuZj7T4WNfz2ntQHgcMCVf5S70=";
+   };
+ 
+   buildInputs = [ libmilter ];
+   nativeCheckInputs = [ pyasyncore ];
+   propagatedBuildInputs = [
+-    bsddb3
++    berkeleydb
+     pydns
+   ];
+-  patches = [
+-    (fetchpatch { # https://github.com/sdgathman/pymilter/pull/57
+-      name = "Remove-calls-to-the-deprecated-method-assertEquals";
+-      url = "https://github.com/sdgathman/pymilter/commit/1ead9028fc63ae3ec6ea3b0c438e6ed088a2b20e.patch";
+-      hash = "sha256-/5LlDR15nMR3l7rkVjT3w4FbDTFAAgNdERWlPNL2TVg=";
+-    })
+-  ];
+ 
+   preBuild = ''
+     sed -i 's/import thread/import _thread as thread/' Milter/greylist.py