Improve HTTP authentication support.

The authentication state is stored (in a hash map, using the domain+path
as a key) in the UrlContext class. It can then be reused for multiple
requests to the same place. We also lookup stored authentications for
parent directories and stop at the first we find.

Authentication state is not stored on disk (unlike cookies), and there
can only be one for each domain+path.

headers/os/net/HttpRequest.h

@@ -9,7 +9,6 @@
 #include <deque>
 
 
-#include <HttpAuthentication.h>
 #include <HttpForm.h>
 #include <HttpHeaders.h>
 #include <HttpResult.h>
@@ -93,7 +92,6 @@ private:
 			BNetBuffer			fInputBuffer;
 
 			BHttpHeaders		fHeaders;
-			BHttpAuthentication	fAuthentication;
 
 	// Request status
 

headers/os/net/UrlContext.h

@@ -6,22 +6,36 @@
 #define _B_URL_CONTEXT_H_
 
 
+#include <HttpAuthentication.h>
 #include <NetworkCookieJar.h>
 
 
+namespace BPrivate {
+	template <class key, class value> class HashMap;
+	class HashString;
+}
+
+
 class BUrlContext {
 public:
 								BUrlContext();
+								~BUrlContext();
 
 	// Context modifiers
 			void				SetCookieJar(
 									const BNetworkCookieJar& cookieJar);
+			void				AddAuthentication(const BUrl& url,
+									BHttpAuthentication* const authentication);
 											
 	// Context accessors
 			BNetworkCookieJar&	GetCookieJar();
+			BHttpAuthentication& GetAuthentication(const BUrl& url);
 
 private:
 			BNetworkCookieJar	fCookieJar;
+			typedef BPrivate::HashMap<BPrivate::HashString,
+				BHttpAuthentication*> BHttpAuthenticationMap;
+			BHttpAuthenticationMap* fAuthenticationMap;
 };
 
 #endif // _B_URL_CONTEXT_H_