Use https for github downloads

Formula/boost-build.rb

@@ -2,7 +2,7 @@ require 'formula'
 
 class BoostBuild < Formula
   homepage 'http://boost.org/boost-build2/'
-  url 'http://github.com/boostorg/build/archive/boost-1.55.0.tar.gz'
+  url 'https://github.com/boostorg/build/archive/boost-1.55.0.tar.gz'
   sha1 '9daf7587b017716ffd164bcf11d82c4ac00c8ca0'
 
   head 'https://github.com/boostorg/build.git'

Formula/es.rb

@@ -2,7 +2,7 @@ require "formula"
 
 class Es < Formula
   homepage "http://wryun.github.io/es-shell/"
-  url "http://github.com/downloads/wryun/es-shell/es-0.9.tar.gz"
+  url "https://github.com/downloads/wryun/es-shell/es-0.9.tar.gz"
   sha1 "40b0b3838c07a434b4cccca9a8bb173c71eda7d8"
 
   option 'with-readline', 'Use readline instead of libedit'

Formula/libcppa.rb

@@ -2,7 +2,7 @@ require 'formula'
 
 class Libcppa < Formula
   homepage 'http://libcppa.blogspot.it'
-  url 'http://github.com/Neverlord/libcppa/archive/V0.8.1.tar.gz'
+  url 'https://github.com/Neverlord/libcppa/archive/V0.8.1.tar.gz'
   sha1 'd4f096aae2bb72e254ad6df45edf3fb62370acaa'
 
   depends_on :macos => :lion

Formula/syck.rb

@@ -3,7 +3,7 @@ require 'formula'
 class Syck < Formula
   homepage 'https://wiki.github.com/indeyets/syck/'
   url 'http://cloud.github.com/downloads/indeyets/syck/syck-0.70.tar.gz'
-  sha1 '30f89eba1fae0546ccfa75a9a3b865a3c8a9ac79'
+  sha1 'e70ebeba684fd1fd126d912e3528115fbb2fb7be'
 
   fails_with :llvm do
     build 2334

Formula/trash.rb

@@ -2,8 +2,8 @@ require 'formula'
 
 class Trash < Formula
   homepage 'http://hasseg.org/trash/'
-  url 'http://github.com/ali-rantakari/trash/archive/v0.8.4.zip'
-  sha1 '233773bcaed903e296f20635808c3dce7ef93c4b'
+  url 'https://github.com/ali-rantakari/trash/archive/v0.8.4.tar.gz'
+  sha1 'e70ebeba684fd1fd126d912e3528115fbb2fb7be'
 
   conflicts_with 'osxutils', :because => 'both install a trash binary'