xdg-app got renamed to Flatpak

Change-Id: Ib5ea4ad5b6033ee1634ea2f245742f862a40042d

desktop/source/app/officeipcthread.cxx

@@ -730,7 +730,7 @@ RequestHandler::Status RequestHandler::Enable(bool ipc)
     enum class Kind { Pipe, Dbus };
     Kind kind = Kind::Pipe;
 #if ENABLE_DBUS
-    if (std::getenv("LIBO_XDGAPP") != nullptr) {
+    if (std::getenv("LIBO_FLATPAK") != nullptr) {
         kind = Kind::Dbus;
     }
 #endif

desktop/unx/source/start.c

@@ -757,7 +757,7 @@ SAL_IMPLEMENT_MAIN_WITH_ARGS( argc, argv )
     if ( pUsePlugin && !strcmp(pUsePlugin, "svp") )
         args->bInhibitSplash = sal_True;
 
-    if ( !args->bInhibitPipe && getenv("LIBO_XDGAPP") == NULL )
+    if ( !args->bInhibitPipe && getenv("LIBO_FLATPAK") == NULL )
     {
         int fd = 0;
         pPipePath = get_pipe_path( args->pAppPath );

distro-configs/LibreOfficeFlatpak.conf

@@ -1,6 +1,6 @@
 --disable-odk
 --enable-release-build
---with-extra-buildid=xdg-app version
+--with-extra-buildid=Flatpak version
 --with-lang=ALL
 --with-system-libs
 --with-vendor=The Document Foundation