Add compatibility aliases for nmsg.base protobuf changes

The previous changes to the nmsg.base protobuf specs changed several
enum type names and value names in the generated code. Use type aliases
and constant definitions to support the previous names.

nmsg_base/compat.go

@@ -0,0 +1,78 @@
+package nmsg_base
+
+//
+// Compatibility definitions for code written against older versions
+// of the nmsg_base .proto files.
+//
+
+type DnsQRType = DnsQR_DnsQRType
+
+const (
+	DnsQRType_UDP_INVALID              = DnsQR_UDP_INVALID
+	DnsQRType_UDP_QUERY_RESPONSE       = DnsQR_UDP_QUERY_RESPONSE
+	DnsQRType_UDP_UNANSWERED_QUERY     = DnsQR_UDP_UNANSWERED_QUERY
+	DnsQRType_UDP_UNSOLICITED_RESPONSE = DnsQR_UDP_UNSOLICITED_RESPONSE
+	DnsQRType_TCP                      = DnsQR_TCP
+	DnsQRType_ICMP                     = DnsQR_ICMP
+	DnsQRType_UDP_QUERY_ONLY           = DnsQR_UDP_QUERY_ONLY
+	DnsQRType_UDP_RESPONSE_ONLY        = DnsQR_UDP_RESPONSE_ONLY
+)
+
+type UdpChecksum = DnsQR_UdpChecksum
+
+const (
+	UdpChecksum_ERROR     = DnsQR_ERROR
+	UdpChecksum_ABSENT    = DnsQR_ABSENT
+	UdpChecksum_INCORRECT = DnsQR_INCORRECT
+	UdpChecksum_CORRECT   = DnsQR_CORRECT
+)
+
+type EmailType = Email_EmailType
+
+const (
+	EmailType_unknown     = Email_unknown
+	EmailType_spamtrap    = Email_spamtrap
+	EmailType_rej_network = Email_rej_network
+	EmailType_rej_content = Email_rej_content
+	EmailType_rej_user    = Email_rej_user
+)
+
+type EncodeType = Encode_EncodeType
+
+const (
+	EncodeType_TEXT    = Encode_TEXT
+	EncodeType_JSON    = Encode_JSON
+	EncodeType_YAML    = Encode_YAML
+	EncodeType_MSGPACK = Encode_MSGPACK
+	EncodeType_XML     = Encode_XML
+)
+
+type HttpType = Http_HttpType
+
+const (
+	HttpType_unknown  = Http_unknown
+	HttpType_sinkhole = Http_sinkhole
+)
+
+type LinkType = Linkpair_Linktype
+
+const (
+	Linktype_anchor   = Linkpair_anchor
+	Linktype_redirect = Linkpair_redirect
+)
+
+type NcapType Ncap_NcapType
+
+const (
+	NcapType_IPV4   = Ncap_IPV4
+	NcapType_IPV6   = Ncap_IPV6
+	NcapType_Legacy = Ncap_Legacy
+)
+
+type NcapLegacyType = Ncap_NcapLegacyType
+
+const (
+	NcapLegacyType_Ncap_UDP  = Ncap_UDP
+	NcapLegacyType_Ncap_TCP  = Ncap_TCP
+	NcapLegacyType_Ncap_ICMP = Ncap_ICMP
+)