Add new package: http-load (#16676)

* Add new package: http-load

* refine version format

* fix date/version error

var/spack/repos/builtin/packages/http-load/package.py

@@ -0,0 +1,33 @@
+# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+import datetime
+
+
+class HttpLoad(MakefilePackage):
+    """http_load - multiprocessing http test client"""
+
+    homepage = "http://www.acme.com/software/http_load/"
+    url      = "http://www.acme.com/software/http_load/http_load-09Mar2016.tar.gz"
+
+    version('2016-03-09', sha256='a2bf118d88f6acd2a082cbf275d141538149caaa0a4ce1bcc66680668e781306')
+
+    def url_for_version(self, version):
+        ver = datetime.datetime.strptime(str(version), '%Y-%m-%d').date()
+        verstr = datetime.datetime.strftime(ver, '%d%b%Y')
+        return "http://www.acme.com/software/http_load/http_load-{0}.tar.gz".format(verstr)
+
+    def edit(self, spec, prefix):
+        makefile = FileFilter("Makefile")
+        makefile.filter("BINDIR =\t/usr/local/bin",
+                        "BINDIR =    {0}/bin".format(self.prefix))
+        makefile.filter("MANDIR =\t/usr/local/man/man1",
+                        "MANDIR={0}/man/man1".format(self.prefix))
+
+    def install(self, spec, prefix):
+        mkdirp(prefix.bin)
+        mkdirp(prefix.man.man1)
+        make('install')