doctor: check for all DYLD env vars

Library/Homebrew/cmd/doctor.rb

@@ -635,31 +635,25 @@ def check_for_config_scripts
   end
 end
 
-def check_for_DYLD_LIBRARY_PATH
-  if ENV['DYLD_LIBRARY_PATH']
-    <<-EOS.undent
-      Setting DYLD_LIBRARY_PATH can break dynamic linking.
-      You should probably unset it.
+def check_DYLD_vars
+  found = ENV.keys.grep(/^DYLD_/)
+  unless found.empty?
+    s = <<-EOS.undent
+    Setting DYLD_* vars can break dynamic linking.
+    Set variables:
     EOS
-  end
-end
+    found.each do |e|
+      s << "    #{e}\n"
+    end
+    if found.include? 'DYLD_INSERT_LIBRARIES'
+      s += <<-EOS.undent
 
-def check_for_DYLD_FALLBACK_LIBRARY_PATH
-  if ENV['DYLD_FALLBACK_LIBRARY_PATH']
-    <<-EOS.undent
-      Setting DYLD_FALLBACK_LIBRARY_PATH can break dynamic linking.
-      You should probably unset it.
-    EOS
-  end
-end
-
-def check_for_DYLD_INSERT_LIBRARIES
-  if ENV['DYLD_INSERT_LIBRARIES']
-    <<-EOS.undent
       Setting DYLD_INSERT_LIBRARIES can cause Go builds to fail.
       Having this set is common if you use this software:
         http://asepsis.binaryage.com/
-    EOS
+      EOS
+    end
+    s
   end
 end