mysql: modernize style, add compilation comment

Formula/mysql.rb

@@ -61,31 +61,32 @@ class Mysql < Formula
       -DINSTALL_MANDIR=share/man
       -DINSTALL_DOCDIR=share/doc/#{name}
       -DINSTALL_INFODIR=share/info
-      -DINSTALL_MYSQLSHAREDIR=share/#{name}
+      -DINSTALL_MYSQLSHAREDIR=share/mysql
       -DWITH_SSL=yes
       -DDEFAULT_CHARSET=utf8
       -DDEFAULT_COLLATION=utf8_general_ci
       -DSYSCONFDIR=#{etc}
+      -DCOMPILATION_COMMENT=Homebrew
     ]
 
     # To enable unit testing at build, we need to download the unit testing suite
-    if build.include? 'with-tests'
+    if build.with? 'tests'
       args << "-DENABLE_DOWNLOADS=ON"
     else
       args << "-DWITH_UNIT_TESTS=OFF"
     end
 
     # Build the embedded server
-    args << "-DWITH_EMBEDDED_SERVER=ON" if build.include? 'with-embedded'
+    args << "-DWITH_EMBEDDED_SERVER=ON" if build.with? 'embedded'
 
     # Compile with readline unless libedit is explicitly chosen
-    args << "-DWITH_READLINE=yes" unless build.include? 'with-libedit'
+    args << "-DWITH_READLINE=yes" unless build.with? 'libedit'
 
     # Compile with ARCHIVE engine enabled if chosen
-    args << "-DWITH_ARCHIVE_STORAGE_ENGINE=1" if build.include? 'with-archive-storage-engine'
+    args << "-DWITH_ARCHIVE_STORAGE_ENGINE=1" if build.with? 'archive-storage-engine'
 
     # Compile with BLACKHOLE engine enabled if chosen
-    args << "-DWITH_BLACKHOLE_STORAGE_ENGINE=1" if build.include? 'with-blackhole-storage-engine'
+    args << "-DWITH_BLACKHOLE_STORAGE_ENGINE=1" if build.with? 'blackhole-storage-engine'
 
     # Make universal for binding to universal applications
     args << "-DCMAKE_OSX_ARCHITECTURES='#{Hardware::CPU.universal_archs.as_cmake_arch_flags}'" if build.universal?
@@ -112,12 +113,14 @@ class Mysql < Formula
 
     # Link the setup script into bin
     ln_s prefix+'scripts/mysql_install_db', bin+'mysql_install_db'
+
     # Fix up the control script and link into bin
     inreplace "#{prefix}/support-files/mysql.server" do |s|
       s.gsub!(/^(PATH=".*)(")/, "\\1:#{HOMEBREW_PREFIX}/bin\\2")
       # pidof can be replaced with pgrep from proctools on Mountain Lion
       s.gsub!(/pidof/, 'pgrep') if MacOS.version >= :mountain_lion
     end
+
     ln_s "#{prefix}/support-files/mysql.server", bin
 
     # Move mysqlaccess to libexec