Address a couple of bugs
    
    - Handle client/server version skew in mod_sql_mysql
      (https://forums.proftpd.org/smf/index.php?topic=11887.0)
    - Fix a possible cause of segfaults in mod_sftp (#1337880, upstream bug 4203)
    - See if we can fix crash in mod_lang
      http://bugs.proftpd.org/show_bug.cgi?id=4206
      https://retrace.fedoraproject.org/faf/reports/10744/
    - BR: perl-generators for correct dependencies in utils sub-package
    - Prefer %global over %define