Use OpenSSL v3 for Windows Qt6 builds

.appveyor.yml

@@ -8,10 +8,13 @@ image:
 
 environment:
   NSISDIR: C:\Program Files (x86)\NSIS
-  OPENSSLDIR: C:\OpenSSL-v111-Win64\bin
   matrix:
   - QTDIR: C:\Qt\5.15\msvc2019_64
+    OPENSSLDIR: C:\OpenSSL-v111-Win64\bin
+    OPENSSLVERSION: 1_1
   - QTDIR: C:\Qt\6.5\msvc2019_64
+    OPENSSLDIR: C:\OpenSSL-v30-Win64\bin
+    OPENSSLVERSION: 3
     NSISDEF: /DQT6
 
 install:
@@ -34,8 +37,8 @@ build_script:
     xcopy lang\*.qm installer\translations\ /sy
     xcopy icons\symbols installer\symbols /i
     copy licence.txt installer
-    copy %OPENSSLDIR%\libcrypto-1_1-x64.dll installer
-    copy %OPENSSLDIR%\libssl-1_1-x64.dll installer
+    copy %OPENSSLDIR%\libcrypto-%OPENSSLVERSION%-x64.dll installer
+    copy %OPENSSLDIR%\libssl-%OPENSSLVERSION%-x64.dll installer
 
     makensis.exe %NSISDEF% installer\gpxsee64.nsi
 

pkg/windows/gpxsee64.nsi

@@ -302,8 +302,13 @@ Section "OpenSSL" SEC_OPENSSL
 
   SectionIn RO
 
+!ifdef QT6
+  File "libcrypto-3-x64.dll"
+  File "libssl-3-x64.dll"
+!else
   File "libcrypto-1_1-x64.dll"
   File "libssl-1_1-x64.dll"
+!endif
 
 SectionEnd