Added get_protocol_iface internal function and use it in
get_protocol_info.

diff --git a/dlls/urlmon/urlmon_main.h b/dlls/urlmon/urlmon_main.h
index 9a012d2..d71b39b 100644
--- a/dlls/urlmon/urlmon_main.h
+++ b/dlls/urlmon/urlmon_main.h
@@ -54,4 +54,6 @@
 HRESULT	UMCreateStreamOnCacheFile(LPCWSTR pszURL, DWORD dwSize, LPWSTR pszFileName, HANDLE *phfile, IUMCacheStream **ppstr);
 void	UMCloseCacheFileStream(IUMCacheStream *pstr);
 
+HRESULT get_protocol_iface(LPCWSTR url, IUnknown **ret);
+
 #endif /* __WINE_URLMON_MAIN_H */