Rename db_pl_add_item -> db_pl_add_item_bypath

For consistency with db_pl_add_item_byid & similar database functions.

src/db.c

@@ -1755,7 +1755,7 @@ db_pl_add(char *title, char *path, int *id)
 }
 
 int
-db_pl_add_item(int plid, char *path)
+db_pl_add_item_bypath(int plid, char *path)
 {
 #define Q_TMPL "INSERT INTO playlistitems (playlistid, filepath) VALUES (%d, '%q');"
   char *query;

src/db.h

@@ -279,7 +279,7 @@ int
 db_pl_add(char *title, char *path, int *id);
 
 int
-db_pl_add_item(int plid, char *path);
+db_pl_add_item_bypath(int plid, char *path);
 
 int
 db_pl_add_item_byid(int plid, int fileid);

src/filescanner_m3u.c

@@ -189,7 +189,7 @@ scan_m3u_playlist(char *file)
 	    continue;
 	  }
 
-	ret = db_pl_add_item(pl_id, filename);
+	ret = db_pl_add_item_bypath(pl_id, filename);
 	if (ret < 0)
 	  DPRINTF(E_WARN, L_SCAN, "Could not add %s to playlist\n", filename);