libfilezilla: Update to 0.24.1.

While here fix the build on SunOS, based on patches in joyent/pkgsrc#266
from mrferda.

0.24.1 (2020-08-27)

- fz::to_integral can now handle strongly typed enum return types

0.24.0 (2020-08-21)

+ Added fz::equal_consttime
- fz::sprintf now works corrcetly if arguments are passed as (w)string_view

0.23.0 (2020-07-07)

+ Added reader/writer locks
- fz::mkdir can now return the the longest created path in case of partial failures


(jperkin)

$NetBSD: patch-lib_socket.cpp,v 1.1 2020/09/17 10:05:44 jperkin Exp $

Spell struct correctly.

--- lib/socket.cpp.orig	2020-08-21 13:35:14.000000000 +0000
+++ lib/socket.cpp
@@ -1678,8 +1678,8 @@ int socket::write(void const* buffer, un
 
 #if !defined(SO_NOSIGPIPE) && !defined(FZ_WINDOWS)
 	// Some systems have neither. Need to block signal
-	sigaction old_action;
-	sigaction action = {};
+	struct sigaction old_action;
+	struct sigaction action = {};
 	action.sa_handler = SIG_IGN;
 	int signal_set = sigaction(SIGPIPE, &action, &old_action);
 #endif

$NetBSD: patch-lib_string.cpp,v 1.6 2020/09/17 10:05:44 jperkin Exp $

Explicitly use std::wcsnrtombs.

--- lib/string.cpp.orig	2020-07-07 12:06:31.000000000 +0000
+++ lib/string.cpp
@@ -354,7 +354,7 @@ std::string to_string(std::wstring_view
 
 			std::mbstate_t ps{};
 			wchar_t const* in_p = in.data() + start;
-			size_t len = wcsnrtombs(nullptr, &in_p, inlen, 0, &ps);
+			size_t len = std::wcsnrtombs(nullptr, &in_p, inlen, 0, &ps);
 			if (len != static_cast<size_t>(-1)) {
 				size_t old = ret.size();
 				if (start) {
@@ -364,7 +364,7 @@ std::string to_string(std::wstring_view
 				char* out_p = &ret[old];
 
 				in_p = in.data() + start; // Some implementations of wcsrtombs change src even on null dst
-				wcsnrtombs(out_p, &in_p, inlen, len, &ps);
+				std::wcsnrtombs(out_p, &in_p, inlen, len, &ps);
 			}
 			else {
 				ret.clear();