Add real syntax doc for LABEL command.

programs/wcmd/wcmdrc.rc

@@ -86,7 +86,12 @@ Syntax:	IF [NOT] EXIST filename command\n\
 In the second form of the command, string1 and string2 must be in double\n\
 quotes. The comparison is not case-sensitive.\n"
 
-  WCMD_LABEL,  "Help about LABEL\n"
+  WCMD_LABEL,  "LABEL is used to set a disk volume label.  \n\
+\n\
+Syntax: LABEL [drive:]\n\
+The command will prompt you for the new volume label for the given drive.\n\
+You can display the disk volume label with the VOL command.\n"
+
   WCMD_MD,     "Help about MD\n"
   WCMD_MKDIR,  "Help about MKDIR\n"
   WCMD_MOVE,