Log Message:
Upgrade to 1.3.6c:

1.3.6c
---------
  + Fixed regression in directory listing latency (Issue #863).
  + Detect OpenSSH-specific formatted SFTPHostKeys, and log hint for
    converting them to supported format.
  + Fixed use-after-free vulnerability during data transfers (Issue #903).
  + Fixed out-of-bounds read in mod_cap by updating the bundled libcap
    (Issue #902).

1.3.6b
---------
  + Fixed pre-authentication remote denial-of-service issue (Issue #846).
  + Backported fix for building mod_sql_mysql using MySQL 8 (Issue #824).

1.3.6a
---------
  + Fixed symlink navigation (Bug#4332).
  + Fixed building of mod_sftp using OpenSSL 1.1.x releases (Issue#674).
  + Fixed SITE COPY honoring of <Limit> restrictions (Bug#4372).
  + Fixed segfault on login when using mod_sftp + mod_sftp_pam (Issue#656).
  + Fixed restarts when using mod_facl as a static module.