LICENSES: Add license text files, add missing notices, fix SPDX tags

SPDX tags don't replace license files. Some notices were missing and
some tags were not according to the SPDX specification, too.

Now reuse --lint from the REUSE tool (https://reuse.software/) passes.

Reported-by: Martin Hauke <mardnh@gmx.de>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/pcap.h b/pcap.h
index d41c68b..26f4f35 100644
--- a/pcap.h
+++ b/pcap.h
@@ -1,3 +1,8 @@
+/* SPDX-License-Identifier: AGPL-3.0-or-later
+ * Copyright (c) 2021 Red Hat GmbH
+ * Author: Stefano Brivio <sbrivio@redhat.com>
+ */
+
 void pcap(char *pkt, size_t len);
 void pcapm(struct msghdr *mh);
 void pcapmm(struct mmsghdr *mmh, unsigned int vlen);