all: use HTTPS for iana.org links

iana.org, www.iana.org and data.iana.org all present a valid TLS
certificate, so let's use it when fetching data to avoid errors in
transit.

Change-Id: I1f295442d24a221fe2b722c4782dceee38b960ec
Reviewed-on: https://go-review.googlesource.com/89415Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

http2/ciphers.go

@@ -5,7 +5,7 @@
 package http2
 
 // A list of the possible cipher suite ids. Taken from
-// http://www.iana.org/assignments/tls-parameters/tls-parameters.txt
+// https://www.iana.org/assignments/tls-parameters/tls-parameters.txt
 
 const (
 	cipher_TLS_NULL_WITH_NULL_NULL               uint16 = 0x0000

internal/iana/gen.go

@@ -28,15 +28,15 @@ var registries = []struct {
 	parse func(io.Writer, io.Reader) error
 }{
 	{
-		"http://www.iana.org/assignments/dscp-registry/dscp-registry.xml",
+		"https://www.iana.org/assignments/dscp-registry/dscp-registry.xml",
 		parseDSCPRegistry,
 	},
 	{
-		"http://www.iana.org/assignments/ipv4-tos-byte/ipv4-tos-byte.xml",
+		"https://www.iana.org/assignments/ipv4-tos-byte/ipv4-tos-byte.xml",
 		parseTOSTCByte,
 	},
 	{
-		"http://www.iana.org/assignments/protocol-numbers/protocol-numbers.xml",
+		"https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xml",
 		parseProtocolNumbers,
 	},
 }

ipv4/gen.go

@@ -72,7 +72,7 @@ var registries = []struct {
 	parse func(io.Writer, io.Reader) error
 }{
 	{
-		"http://www.iana.org/assignments/icmp-parameters/icmp-parameters.xml",
+		"https://www.iana.org/assignments/icmp-parameters/icmp-parameters.xml",
 		parseICMPv4Parameters,
 	},
 }

ipv6/gen.go

@@ -72,7 +72,7 @@ var registries = []struct {
 	parse func(io.Writer, io.Reader) error
 }{
 	{
-		"http://www.iana.org/assignments/icmpv6-parameters/icmpv6-parameters.xml",
+		"https://www.iana.org/assignments/icmpv6-parameters/icmpv6-parameters.xml",
 		parseICMPv6Parameters,
 	},
 }