Fixed mysqldump to use -- instead of # as comment characters.
Removed support for the 3.20 protocol format


Docs/manual.texi:
  Update Changelog
client/mysqldump.c:
  Fixed dump to use -- instead of # as comment characters.
libmysql/libmysql.c:
  Removed support for the 3.20 protocol format
myisam/myisamchk.c:
  Fixed typo in printf
mysql-test/r/varbinary.result:
  Test of new hex constant format
mysql-test/t/varbinary.test:
  Test of new hex constant format
sql/sql_lex.cc:
  Added support for ANSI SQL X'hex-string' format.
sql/sql_lex.h:
  Added support for ANSI SQL X'hex-string' format.
sql/sql_yacc.yy:
  Added support for ANSI SQL X'hex-string' format.