Adding syntax sugar.

With exceptions and overloads.

src/nodejs/unit-http/binding_pub.gyp

@@ -1,6 +1,15 @@
 {
     'targets': [{
         'target_name': "unit-http",
+        'cflags!': [ '-fno-exceptions' ],
+        'cflags_cc!': [ '-fno-exceptions' ],
+        'conditions': [
+            ['OS=="mac"', {
+              'xcode_settings': {
+                'GCC_ENABLE_CPP_EXCEPTIONS': 'YES'
+              }
+            }]
+        ],
         'sources': ["unit.cpp", "addon.cpp"],
         'libraries': ["-lunit"]
     }]