Log Message:
Updated databases/mysql55-{client,server} to 5.5.55
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Picks securiy part from
  https://dev.mysql.com/doc/relnotes/mysql/5.5/en/news-5-5-55.html
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Security Notes

   The mysql_options() C API function now supports a
MYSQL_OPT_SSL_MODE option. The only permitted option value is
SSL_MODE_REQUIRED, to require a secure connection to the server. It
causes mysql_real_connect() to fail if an encrypted connection cannot
be obtained, without falling back to an unencrypted connection. Thus,
mysql_real_connect() returns an error if the server does not support
SSL or the client is not configured to use SSL. The client/server
exchange terminates immediately after the initial server packet has
been received if the server indicates that it does not support SSL.

   To require an encrypted connection in MySQL 5.5, the standard MySQL
client programs call mysql_options() to set MYSQL_OPT_SSL_MODE if the
--ssl-mode=REQUIRED command-line option was specified. Third-party
applications that must be able to require encrypted connections can
use the same technique. For details, see mysql_ssl_set().

   The minor C API version number was not incremented for this
change. Application programs compiled for MySQL 5.5 that require
MYSQL_OPT_SSL_MODE may fail to operate properly if the dynamic loader
provides an older client library without MYSQL_OPT_SSL_MODE. Such
applications must be written to handle this possibility by checking
whether the mysql_options() call succeeds or fails. (Bug #25575605)