Stick license and SPDX on *.vsc files.

bin/varnishd/VSC_lck.vsc

+..
+	Copyright (c) 2017-2019 Varnish Software AS
+	SPDX-License-Identifier: BSD-2-Clause
+	See LICENSE file for full text of licens
+
 ..
 	This is *NOT* a RST file but the syntax has been chosen so
 	that it may become an RST file at some later date.

bin/varnishd/VSC_main.vsc

+..
+	Copyright (c) 2017-2020 Varnish Software AS
+	SPDX-License-Identifier: BSD-2-Clause
+	See LICENSE file for full text of licens
+
 ..
 	This is *NOT* a RST file but the syntax has been chosen so
 	that it may become an RST file at some later date.

bin/varnishd/VSC_mempool.vsc

+..
+	Copyright (c) 2017 Varnish Software AS
+	SPDX-License-Identifier: BSD-2-Clause
+	See LICENSE file for full text of licens
+
 ..
 	This is *NOT* a RST file but the syntax has been chosen so
 	that it may become an RST file at some later date.

bin/varnishd/VSC_mgt.vsc

+..
+	Copyright (c) 2017 Varnish Software AS
+	SPDX-License-Identifier: BSD-2-Clause
+	See LICENSE file for full text of licens
+
 ..
 	This is *NOT* a RST file but the syntax has been chosen so
 	that it may become an RST file at some later date.

bin/varnishd/VSC_sma.vsc

+..
+	Copyright (c) 2017 Varnish Software AS
+	SPDX-License-Identifier: BSD-2-Clause
+	See LICENSE file for full text of licens
+
 ..
 	This is *NOT* a RST file but the syntax has been chosen so
 	that it may become an RST file at some later date.

bin/varnishd/VSC_smf.vsc

+..
+	Copyright (c) 2017 Varnish Software AS
+	SPDX-License-Identifier: BSD-2-Clause
+	See LICENSE file for full text of licens
+
 ..
 	This is *NOT* a RST file but the syntax has been chosen so
 	that it may become an RST file at some later date.

bin/varnishd/VSC_smu.vsc

+..
+	Copyright (c) 2017 Varnish Software AS
+	SPDX-License-Identifier: BSD-2-Clause
+	See LICENSE file for full text of licens
+
 ..
 	This is *NOT* a RST file but the syntax has been chosen so
 	that it may become an RST file at some later date.

bin/varnishd/VSC_vbe.vsc

+..
+	Copyright (c) 2017-2021 Varnish Software AS
+	SPDX-License-Identifier: BSD-2-Clause
+	See LICENSE file for full text of licens
+
 ..
 	This is *NOT* a RST file but the syntax has been chosen so
 	that it may become an RST file at some later date.

vmod/VSC_debug.vsc

+..
+	Copyright (c) 2021 Varnish Software AS
+	SPDX-License-Identifier: BSD-2-Clause
+	See LICENSE file for full text of licens
+
 #
 .. varnish_vsc_begin::	debug
 	:oneliner:	Example Counters