net,tsnet: fix the capitalisation of "Wireshark"

See https://www.wireshark.org/; there's no intercapped S.

Updates #cleanup

Change-Id: I7c89a3fc6fb0436d0ce0e25a620bde7e310e89d2
Signed-off-by: Alex Chan <alexc@tailscale.com>

net/packet/icmp6_test.go

@@ -57,7 +57,7 @@ func TestICMPv6Checksum(t *testing.T) {
 		"\x00\x00\x00\x00\x00\x00\x20\x0e\x80\x00\x4a\x9a\x2e\xea\x00\x02" +
 		"\x61\xb1\x9e\xad\x00\x06\x45\xaa"
 	// The packet that we'd originally generated incorrectly, but with the checksum
-	// bytes fixed per WireShark's correct calculation:
+	// bytes fixed per Wireshark's correct calculation:
 	const wantRes = "\x60\x00\xf8\xff\x00\x10\x3a\x40\x26\x07\xf8\xb0\x40\x0a\x08\x07" +
 		"\x00\x00\x00\x00\x00\x00\x20\x0e\xfd\x7a\x11\x5c\xa1\xe0\xab\x12" +
 		"\x48\x43\xcd\x96\x62\x7b\x65\x28\x81\x00\x49\x9a\x2e\xea\x00\x02" +

net/tlsdial/tlsdial.go

@@ -77,7 +77,7 @@ func Config(ht *health.Tracker, base *tls.Config) *tls.Config {
 
 	if buildfeatures.HasDebug {
 		// If SSLKEYLOGFILE is set, it's a file to which we write our TLS private keys
-		// in a way that WireShark can read.
+		// in a way that Wireshark can read.
 		//
 		// See https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/Key_Log_Format
 		if n := os.Getenv("SSLKEYLOGFILE"); n != "" {