Call pthread_mutex_destroy() on not used mutex.
Changed comments in .h and .c files from // -> /* */
Added detection of mutex on which one didn't call pthread_mutex_destroy()
Fixed bug in create_tmp_field() which causes a memory overrun in queries that uses "ORDER BY constant_expression"
Added optimisation for ORDER BY NULL
mysqlmanager from using GNU getopt to use my_getopt.
Changed some files that just included old getopt.h to include
my_getopt.h now.
Fixed a bug in my_print_help() in my_getopt.c.
Made better documentation for option -G in mysql client.
