snort 2.9.3.1

Closes Homebrew/homebrew#14380.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/snort.rb

@@ -2,16 +2,14 @@ require 'formula'
 
 class Snort < Formula
   homepage 'http://www.snort.org'
-  url 'http://www.snort.org/dl/snort-current/snort-2.9.3.tar.gz'
-  md5 'e128f5d5d14dad335dc0c549c7fe2e98'
+  url 'http://www.snort.org/dl/snort-current/snort-2.9.3.1.tar.gz'
+  sha1 '25dfea22a988dd1dc09a1716d8ebfcf2b7d61c19'
 
   depends_on 'daq'
   depends_on 'libdnet'
   depends_on 'pcre'
 
-  def options
-    [['--enable-debug', "Compile Snort with --enable-debug and --enable-debug-msgs"]]
-  end
+  option 'enable-debug', "Compile Snort with --enable-debug and --enable-debug-msgs"
 
   def install
     args = %W[--prefix=#{prefix}
@@ -30,7 +28,7 @@ class Snort < Formula
               --enable-react
               --enable-flexresp3]
 
-    if ARGV.include?('--enable-debug')
+    if build.include? 'enable-debug'
       args << "--enable-debug"
       args << "--enable-debug-msgs"
     else
@@ -41,8 +39,7 @@ class Snort < Formula
     system "make install"
   end
 
-  def caveats
-    <<-EOS.undent
+  def caveats; <<-EOS.undent
     For snort to be functional, you need to update the permissions for /dev/bpf*
     so that they can be read by non-root users.  This can be done manually using:
         sudo chmod 644 /dev/bpf*