Bug#29323 mysql client only accetps ANSI encoded files

Fix: ignore BOM marker in the first line.

client/mysql.cc

@@ -1042,6 +1042,17 @@ static int read_and_execute(bool interactive)
     if (!interactive)
     {
       line=batch_readline(status.line_buff);
+      /*
+        Skip UTF8 Byte Order Marker (BOM) 0xEFBBBF.
+        Editors like "notepad" put this marker in
+        the very beginning of a text file when
+        you save the file using "Unicode UTF-8" format.
+      */
+      if (!line_number &&
+           (uchar) line[0] == 0xEF &&
+           (uchar) line[1] == 0xBB &&
+           (uchar) line[2] == 0xBF)
+        line+= 3;
       line_number++;
       if (!glob_buffer.length())
 	status.query_start_line=line_number;