v0.5.2: bump version (coordinated cross-repo release) + Win64 fix

fw_consts.pas is hardlinked across Server/Client/Doors/Common; all
three binaries now report v0.5.2 from a single source. Bundles the
prior cross-repo cleanup commit (Server-canonical shared units, mysql/
postgres Makefile paths, fw_filewatcher + fw_schema added).

Win64 cross-compile fix bundled in (re-issued v0.5.2 — original
v0.5.2 build failed at fm_net_socket.pas because IsPortInUse and
TFMSocket.WaitForData declared Unix-specific local vars (cint /
TFDSet / TTimeVal) outside the {\$IFDEF UNIX} guard. Wrapped each
function's var section AND body in {\$IFDEF UNIX} with a plain
Windows stub. Linux + FreeBSD + Win64 verified locally.

Client functional behavior unchanged on Linux/FreeBSD — thin client
still talks to primary server via REST/WS.

src/units/fm_net_socket.pas

@@ -92,6 +92,7 @@ const
   {$ENDIF}
 
 function IsPortInUse(APort: Word): Boolean;
+{$IFDEF UNIX}
 var
   Sock: cint;
   Addr: TSockAddr;
@@ -112,6 +113,13 @@ begin
     fpClose(Sock);
   end;
 end;
+{$ELSE}
+begin
+  { Best-effort: on non-Unix platforms we don't pre-check; the listener
+    will fail fast on bind() if the port is genuinely in use. }
+  Result := False;
+end;
+{$ENDIF}
 
 { TFMSocket }
 
@@ -291,6 +299,7 @@ begin
 end;
 
 function TFMSocket.WaitForData(ATimeoutMS: Integer): Boolean;
+{$IFDEF UNIX}
 var
   FDS: TFDSet;
   TimeVal: TTimeVal;
@@ -300,7 +309,6 @@ begin
   Result := False;
   if not FConnected then Exit;
 
-  {$IFDEF UNIX}
   if Assigned(FSocket) then
     Fd := FSocket.Handle
   else if Assigned(FStream) and (FStream is THandleStream) then
@@ -314,10 +322,13 @@ begin
   TimeVal.tv_usec := (ATimeoutMS mod 1000) * 1000;
   Ret := fpSelect(Fd + 1, @FDS, nil, nil, @TimeVal);
   Result := Ret > 0;
-  {$ELSE}
-  Result := True;
-  {$ENDIF}
 end;
+{$ELSE}
+begin
+  { Non-Unix: assume data is available; caller will handle EAGAIN. }
+  Result := FConnected;
+end;
+{$ENDIF}
 
 { TFMListener }
 

src/units/fw_consts.pas

@@ -7,8 +7,8 @@ interface
 const
   FW_VERSION_MAJOR   = 0;
   FW_VERSION_MINOR   = 5;
-  FW_VERSION_PATCH   = 0;
-  FW_VERSION_STRING  = '0.5.0';
+  FW_VERSION_PATCH   = 2;
+  FW_VERSION_STRING  = '0.5.2';
   FW_PRODUCT_NAME    = 'Fastway BBS';
   FW_PRODUCT_CODE    = 'FWBBS';
   FW_SERVER_BANNER   = FW_PRODUCT_NAME + ' v' + FW_VERSION_STRING;