Add Alpine email client (#3845)

Add alpine package

packages/alpine.rb

+require 'package'
+
+class Alpine < Package                 # The first character of the class name must be upper case
+  description 'The continuation of the Alpine email client from University of Washington.'
+  homepage 'http://alpine.x10host.com/alpine'
+  version '2.22'
+  source_url 'http://alpine.x10host.com/alpine/release/src/alpine-2.22.tar.xz'
+  source_sha256 '849567c1b6f71fde3aaa1c97cf0577b12a525d9e22c0ea47797c4bf1cd2bbfdb'   # Use the command "sha256sum"
+
+  def self.build                   # the steps required to build the package
+    system "./configure",
+    "--prefix=#{CREW_PREFIX}",
+    "--libdir=#{CREW_LIB_PREFIX}",
+    "--with-ssl-dir=/etc/ssl",
+    "--with-ssl-include-dir=#{CREW_PREFIX}/include",
+    "--with-ssl-lib-dir=#{CREW_LIB_PREFIX}", "--disable-nls",
+    "--with-system-pinerc=#{CREW_PREFIX}/etc/alpine.d/pine.conf",
+    "--with-system-fixed-pinerc=#{CREW_PREFIX}/etc/alpine/pine.conf.fixed"
+    system "make"
+  end
+
+  def self.install                 # the steps required to install the package
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+
+  def self.check                   # the steps required to check if the package was built ok
+    system "make", "check"
+  end
+end