sipp: add support for pcap and tls.

Closes Homebrew/legacy-homebrew#26708.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Formula/sipp.rb

@@ -2,10 +2,15 @@
 
 class Sipp < Formula
   homepage 'http://sipp.sourceforge.net/'
-  url 'http://downloads.sourceforge.net/project/sipp/sipp/3.3/sipp-3.3.tar.gz'
-  sha1 'a8e088b7e1e3673eddfbe2fd4e1486dd87919520'
+  url "http://downloads.sourceforge.net/project/sipp/sipp/3.4/sipp-3.3.990.tar.gz"
+  sha1 "b2637cb72556595253bbdd4a68cc974c9ac1d92e"
+
+  depends_on "openssl" => :optional
 
   def install
+    args = ["--with-pcap"]
+    args << "--with-openssl" if build.with? "openssl"
+    system "./configure", *args
     system "make", "DESTDIR=#{prefix}"
     bin.install "sipp"
   end