Bug#37268 'binary' character set makes CLI-internal commands case sensitive

The fix is to use case insensitive collation
for mysql client command search.

client/mysql.cc

@@ -1949,7 +1949,7 @@ static COMMANDS *find_command(char *name,char cmd_char)
     */
     if (strstr(name, "\\g") || (strstr(name, delimiter) &&
                                 !(strlen(name) >= 9 &&
-                                  !my_strnncoll(charset_info,
+                                  !my_strnncoll(&my_charset_latin1,
                                                 (uchar*) name, 9,
                                                 (const uchar*) "delimiter",
                                                 9))))
@@ -1970,7 +1970,7 @@ static COMMANDS *find_command(char *name,char cmd_char)
   {
     if (commands[i].func &&
 	((name &&
-	  !my_strnncoll(charset_info,(uchar*)name,len,
+	  !my_strnncoll(&my_charset_latin1, (uchar*)name, len,
 				     (uchar*)commands[i].name,len) &&
 	  !commands[i].name[len] &&
 	  (!end || (end && commands[i].takes_params))) ||

mysql-test/r/mysql.result

@@ -198,4 +198,5 @@ COUNT (*)
 1
 COUNT (*)
 1
+ERROR 2005 (HY000) at line 1: Unknown MySQL server host 'invalid_hostname' (1)
 End of 5.0 tests

mysql-test/t/mysql.test

@@ -348,4 +348,11 @@ remove_file $MYSQLTEST_VARDIR/tmp/bug31060.sql;
 --exec $MYSQL --ignore-spaces -e "SELECT COUNT (*)"
 --exec $MYSQL -b -i -e "SELECT COUNT (*)"
 
+#
+# Bug#37268 'binary' character set makes CLI-internal commands case sensitive
+#
+--error 1
+--exec $MYSQL --default-character-set=binary test -e "CONNECT test invalid_hostname" 2>&1
+--exec $MYSQL --default-character-set=binary test -e "DELIMITER //" 2>&1
+
 --echo End of 5.0 tests