Bug #19606: ssl variables are not displayed in show variables
Bug #19616: log_queries_not_using_indexes  is not listed in show variables

  Make basedir, datadir, tmpdir, log_queries_not_using_indexes, ssl_ca,
  ssl_capath, ssl_cert, ssl_cipher, and ssl_key all available both from
  SHOW VARIABLES and as @@variables.

  As a side-effect of this change, log_queries_not_using_indexes can
  be changed at runtime (but only globally, not per-connection).


include/sslopt-longopts.h:
  Put options in alphabetical order
include/sslopt-vars.h:
  Allow define of SSL_VARS_NOT_STATIC to prevent variables from not being
  made static.
mysql-test/r/variables.result:
  Add new results
mysql-test/t/variables.test:
  Add new regression tests
sql/mysql_priv.h:
  Add extern for opt_log_queries_not_using_indexes
sql/mysqld.cc:
  Handle opt_log_queries_not_using_indexes as extern, and define
  SSL_VARS_NO_STATIC so they can be accessed outside of mysqld.cc
sql/set_var.cc:
  Handle basedir, datadir, tmpdir, log_queries_not_using_indexes, and
  various ssl settings so that they are accessible as server variables
  and listed in SHOW VARIABLES.
sql/set_var.h:
  Add new sys_var_constr_str_ptr class, for when we have a system variable
  that is only set via the command-line that is a pointer to a string.