more name hint interace updates

- add long card name to device description
- create empty PCM plugin to allow right hint description parsing
- reorder devices in alsa.conf
- make namehint more configurable (using default.namehint.showall switch)
- add two levels basic and exteded for hints to default configuration files
- do not show direct device aliases
- removed all known memory leaks

src/conf/pcm/dsnoop.conf

@@ -12,14 +12,14 @@ pcm.!dsnoop {
 		}
 	}
 	@args.DEV {
-		type string
+		type integer
 		default {
 			@func refer
 			name defaults.pcm.dsnoop.device
 		}
 	}
 	@args.SUBDEV {
-		type string
+		type integer
 		default -1
 	}
 	@args.FORMAT {
@@ -120,6 +120,10 @@ pcm.!dsnoop {
 		}
 	}
 	hint {
+		show {
+			@func refer
+			name defaults.namehint.extended
+		}
 		description "Direct sample snooping device"
 		device $DEV
 	}