Log Message:
libfilezilla: update to 0.27.0.

2021-03-04 - libfilezilla 0.27.0 released

New features:

    Added fz::normalize_hypens to replace all hyphen-like characters in a string \ 
with the good old hyphen-minus
    Added fz::pbkdf2_hmac_sha256
    Added visibility_helper.hpp to simplify exporting symbols in shared libraries
    Added fz::compound_rate_limited_layer to which multiple rate limiters can be \ 
dynamically added/removed
    Added redirect_io parameter to fz::process::spawn
    Added --enable-socketdebug configure argument to check for invariant \ 
violation when handling socket events
    Added a optional preamble to server_handshake that is sent after \ 
initializing the session, but before the SERVER_HELLO

Bugfixes and minor changes:

    Various fixes to socket event retriggering if \ 
socket_interface::set_event_handler is used
    Fixed a nullpointer dereference in fz::tls_layer if a hostname is set prior \ 
to creating a session

2020-12-17 - libfilezilla 0.26.0 released

New features:

    Added fz::buffer::capacity()
    fz::buffer::append now also accepts single characters and std::vector
    Added fz::nonowning_buffer
    MSW: Added fz::process::handle()
    *nix: Allow passing extra file descriptors to child processes
    fz::to_wstring_from_utf8 now accepts std::string_view and fz::buffer
    fz::replace_substrings and fz::replaced_substrings now accept string views \ 
and single characters

Bugfixes and minor changes:

    Reset bucket data if it gets removed from a rate_limiter

2020-10-13 - libfilezilla 0.25.0 released

New features:

    Added fz::invoker to asynchronously call functions to run in a specific \ 
thread independent of the caller's thread

Bugfixes and minor changes:

    Added additional checks to fz::buffer to leave the buffer in a valid state \ 
in out-of-memory situations and to prevent mis-use
    Detect a particular socket buffer tuning issue under Linux where setting a \ 
receiver buffer size shrinks the window scale factor
    Reordered a few data members to reduce the amount of structure padding due \ 
to alignment