Fix ssl=false parsing

ssl was mistakenly set to the string "false" instead of the Boolean false.

Author: sonicdoe

index.js

@@ -58,7 +58,7 @@ function parse(str) {
     config.ssl = true;
   }
 
-  if (config.ssl === '0') {
+  if (config.ssl === 'false' || config.ssl === '0') {
     config.ssl = false;
   }
 

test/parse.js

@@ -180,6 +180,12 @@ describe('parse', function(){
     var subject = parse(connectionString);
     subject.ssl.should.equal(true);
   });
+  
+  it('configuration parameter ssl=false', function(){
+    var connectionString = 'pg:///?ssl=false';
+    var subject = parse(connectionString);
+    subject.ssl.should.equal(false);
+  });
 
   it('configuration parameter ssl=1', function(){
     var connectionString = 'pg:///?ssl=1';