LocateUri: pass URI plugin kind, optionally disables plugin verify

Commit b3a458338a added a LocateUri()
call to several playlist commands, which applied InputPlugin URI
scheme verification to playlist URIs.  This broke the SoundCloud
playlist plugin which uses "soundcloud://" URIs for which no input
plugin exists.

This commit allows the caller to specify the kind of plugin which
shall be used to verify the URI.  Right now, only "input" is
implemented; "storage" uses the "input" verification for now; and
"playlist" has no verification at all (for now).

Closes https://github.com/MusicPlayerDaemon/MPD/issues/528

src/command/FileCommands.cxx

@@ -218,7 +218,7 @@ handle_read_comments(Client &client, Request args, Response &r)
 
 	const char *const uri = args.front();
 
-	const auto located_uri = LocateUri(uri, &client
+	const auto located_uri = LocateUri(UriPluginKind::INPUT, uri, &client
 #ifdef ENABLE_DATABASE
 					   , nullptr
 #endif
@@ -331,7 +331,7 @@ handle_album_art(Client &client, Request args, Response &r)
 	const char *uri = args.front();
 	size_t offset = args.ParseUnsigned(1);
 
-	const auto located_uri = LocateUri(uri, &client
+	const auto located_uri = LocateUri(UriPluginKind::INPUT, uri, &client
 #ifdef ENABLE_DATABASE
 					   , nullptr
 #endif

src/command/OtherCommands.cxx

@@ -99,7 +99,7 @@ handle_listfiles(Client &client, Request args, Response &r)
 	/* default is root directory */
 	const auto uri = args.GetOptional(0, "");
 
-	const auto located_uri = LocateUri(uri, &client
+	const auto located_uri = LocateUri(UriPluginKind::STORAGE, uri, &client
 #ifdef ENABLE_DATABASE
 					   , nullptr
 #endif
@@ -219,7 +219,7 @@ handle_lsinfo(Client &client, Request args, Response &r)
 		   compatibility, work around this here */
 		uri = "";
 
-	const auto located_uri = LocateUri(uri, &client
+	const auto located_uri = LocateUri(UriPluginKind::INPUT, uri, &client
 #ifdef ENABLE_DATABASE
 					   , nullptr
 #endif

src/command/PlaylistCommands.cxx

@@ -69,7 +69,8 @@ handle_save(Client &client, Request args, gcc_unused Response &r)
 CommandResult
 handle_load(Client &client, Request args, gcc_unused Response &r)
 {
-	const auto uri = LocateUri(args.front(), &client
+	const auto uri = LocateUri(UriPluginKind::PLAYLIST, args.front(),
+				   &client
 #ifdef ENABLE_DATABASE
 					   , nullptr
 #endif
@@ -99,7 +100,8 @@ handle_load(Client &client, Request args, gcc_unused Response &r)
 CommandResult
 handle_listplaylist(Client &client, Request args, Response &r)
 {
-	const auto name = LocateUri(args.front(), &client
+	const auto name = LocateUri(UriPluginKind::PLAYLIST, args.front(),
+				    &client
 #ifdef ENABLE_DATABASE
 					   , nullptr
 #endif
@@ -115,7 +117,8 @@ handle_listplaylist(Client &client, Request args, Response &r)
 CommandResult
 handle_listplaylistinfo(Client &client, Request args, Response &r)
 {
-	const auto name = LocateUri(args.front(), &client
+	const auto name = LocateUri(UriPluginKind::PLAYLIST, args.front(),
+				    &client
 #ifdef ENABLE_DATABASE
 					   , nullptr
 #endif

src/command/QueueCommands.cxx

@@ -83,7 +83,8 @@ handle_add(Client &client, Request args, Response &r)
 		   here */
 		uri = "";
 
-	const auto located_uri = LocateUri(uri, &client
+	const auto located_uri = LocateUri(UriPluginKind::INPUT, uri,
+					   &client
 #ifdef ENABLE_DATABASE
 					   , nullptr
 #endif