add charybdis to nixpkgs

pkgs/servers/irc/charybdis/default.nix

@@ -0,0 +1,34 @@
+{ stdenv, fetchgit, bison, flex, openssl }:
+
+stdenv.mkDerivation rec {
+  name = "charybdis-3.5.0-rc1";
+
+  src = fetchgit {
+    url = "https://github.com/atheme/charybdis.git";
+    rev = "43a9b61c427cd0f3fa2c192890b8a48d9ea6fb7f";
+    sha256 = "ae2c8a72e6a29c901f9b51759b542ee12c4ec918050a2d9d65e5635077a0fcef";
+  };
+
+  patches = [
+     ./remove-setenv.patch
+  ];
+
+  configureFlags = [
+    "--enable-epoll"
+    "--enable-ipv6"
+    "--enable-openssl=${openssl}"
+    "--with-program-prefix=charybdis-"
+  ];
+
+  buildInputs = [ bison flex openssl ];
+
+  meta = {
+    description = "An extremely scalable ircd with some cooperation with the ratbox and ircu guys";
+    homepage    = https://github.com/atheme/charybdis;
+    license     = stdenv.lib.licenses.gpl2;
+    maintainers = [ stdenv.lib.maintainers.lassulus ];
+    platforms   = stdenv.lib.platforms.all;
+  };
+
+
+}

pkgs/servers/irc/charybdis/remove-setenv.patch

@@ -0,0 +1,12 @@
+diff --git a/src/bandbi.c b/src/bandbi.c
+index 03dd907..3698e85 100644
+--- a/src/bandbi.c
++++ b/src/bandbi.c
+@@ -82,7 +82,6 @@ start_bandb(void)
+ 	const char *suffix = "";
+ #endif
+ 
+-	rb_setenv("BANDB_DBPATH", PKGLOCALSTATEDIR "/ban.db", 1);
+ 	if(bandb_path == NULL)
+ 	{
+ 		rb_snprintf(fullpath, sizeof(fullpath), "%s/bandb%s", PKGLIBEXECDIR, suffix);

pkgs/top-level/all-packages.nix

@@ -8371,6 +8371,8 @@ let
   bosun = callPackage ../servers/monitoring/bosun {};
   scollector = callPackage ../servers/monitoring/bosun/scollector.nix {};
 
+  charybdis = callPackage ../servers/irc/charybdis {};
+
   couchdb = callPackage ../servers/http/couchdb {
     spidermonkey = spidermonkey_185;
     python = python27;