x11-wm/plasma5-kwin: unbreak Xwayland support after 4ea20bee50

kwin_xwl: Failed to find free X11 connection socket

PR:		259614
Approved by:	tcberner

(cherry picked from commit 03033c16bb)

x11-wm/plasma5-kwin/Makefile

@@ -1,5 +1,6 @@
 PORTNAME=	kwin
 DISTVERSION=	${KDE_PLASMA_VERSION}
+PORTREVISION=	1
 CATEGORIES=	x11-wm kde kde-plasma
 
 MAINTAINER=	kde@FreeBSD.org

x11-wm/plasma5-kwin/files/patch-src_xwl_xwaylandsocket.cpp

@@ -0,0 +1,35 @@
+$ kwin_wayland --xwayland
+[...]
+kwin_xwl: Failed to find free X11 connection socket
+Failed to establish X11 socket
+
+--- src/xwl/xwaylandsocket.cpp.orig	2021-08-31 11:41:03 UTC
++++ src/xwl/xwaylandsocket.cpp
+@@ -179,10 +179,17 @@ XwaylandSocket::XwaylandSocket()
+             continue;
+         }
+ 
++#if defined(Q_OS_LINUX)
+         const int abstractFileDescriptor = listen_helper(socketFilePath, UnixSocketAddress::Type::Abstract);
++#else
++        const int abstractFileDescriptor = listen_helper(socketFilePath + "_", UnixSocketAddress::Type::Unix);
++#endif
+         if (abstractFileDescriptor == -1) {
+             QFile::remove(lockFilePath);
+             QFile::remove(socketFilePath);
++#if !defined(Q_OS_LINUX)
++            QFile::remove(socketFilePath + "_");
++#endif
+             close(unixFileDescriptor);
+             continue;
+         }
+@@ -208,6 +215,9 @@ XwaylandSocket::~XwaylandSocket()
+     }
+     if (!m_socketFilePath.isEmpty()) {
+         QFile::remove(m_socketFilePath);
++#if !defined(Q_OS_LINUX)
++        QFile::remove(m_socketFilePath + "_");
++#endif
+     }
+     if (!m_lockFilePath.isEmpty()) {
+         QFile::remove(m_lockFilePath);