treewide: fix invalid gentoo/distfiles urls (#257808)

* nettools: fix url; avoid gentoo/distfiles which now uses hashed directories

* pax-utils: fix url; avoid gentoo/distfiles which now uses hashed directories

The project doesn't seem to publish the exact tarball which was relied
on, but we can fetch the sources from the original repository.  (This
implies some rebuilds.)

* mtx: fix url; avoid gentoo/distfiles which now uses hashed directories

* vlan: fix url; avoid gentoo/distfiles which now uses hashed directories

pkgs/os-specific/linux/net-tools/default.nix

@@ -5,7 +5,7 @@ stdenv.mkDerivation rec {
   version = "2.10";
 
   src = fetchurl {
-    url = "mirror://gentoo/distfiles/${pname}-${version}.tar.xz";
+    url = "mirror://sourceforge/${pname}/${pname}-${version}.tar.xz";
     sha256 = "sha256-smJDWlJB6Jv6UcPKvVEzdTlS96e3uT8y4Iy52W9YDWk=";
   };
 

pkgs/os-specific/linux/pax-utils/default.nix

@@ -1,6 +1,6 @@
 { stdenv
 , lib
-, fetchurl
+, fetchgit
 , buildPackages
 , docbook_xml_dtd_44
 , docbook_xsl
@@ -18,9 +18,10 @@ stdenv.mkDerivation rec {
   pname = "pax-utils";
   version = "1.3.7";
 
-  src = fetchurl {
-    url = "mirror://gentoo/distfiles/${pname}-${version}.tar.xz";
-    sha256 = "sha256-EINi0pZo0lz3sMrcY7FaTBz8DbxxrcFRszxf597Ok5o=";
+  src = fetchgit {
+    url = "https://anongit.gentoo.org/git/proj/pax-utils.git";
+    rev = "v${version}";
+    hash = "sha256-WyNng+UtfRz1+Eu4gwXLxUvBAg+m3mdrc8GdEPYRKVE=";
   };
 
   strictDeps = true;

pkgs/tools/backup/mtx/default.nix

@@ -5,7 +5,7 @@ stdenv.mkDerivation rec {
   version = "1.3.12";
 
   src = fetchurl {
-    url = "mirror://gentoo/distfiles/mtx-${version}.tar.gz";
+    url = "mirror://sourceforge/${pname}/${pname}-stable/${version}/${pname}-${version}.tar.gz";
     sha256 = "0261c5e90b98b6138cd23dadecbc7bc6e2830235145ed2740290e1f35672d843";
   };
 

pkgs/tools/networking/vlan/default.nix

@@ -5,7 +5,7 @@ stdenv.mkDerivation rec {
   version = "1.9";
 
   src = fetchurl {
-    url = "mirror://gentoo/distfiles/vlan.${version}.tar.gz";
+    url = "https://www.candelatech.com/~greear/${pname}/${pname}.${version}.tar.gz";
     sha256 = "1jjc5f26hj7bk8nkjxsa8znfxcf8pgry2ipnwmj2fr6ky0dhm3rv";
   };