Update vendor, move to labstack/echo/v4 Fixes #698

vendor/github.com/shazow/ssh-chat/internal/sanitize/sanitize.go

@@ -0,0 +1,28 @@
+package sanitize
+
+import "regexp"
+
+var reStripName = regexp.MustCompile("[^\\w.-]")
+
+const maxLength = 16
+
+// Name returns a name with only allowed characters and a reasonable length
+func Name(s string) string {
+	s = reStripName.ReplaceAllString(s, "")
+	nameLength := maxLength
+	if len(s) <= maxLength {
+		nameLength = len(s)
+	}
+	s = s[:nameLength]
+	return s
+}
+
+var reStripData = regexp.MustCompile("[^[:ascii:]]|[[:cntrl:]]")
+
+// Data returns a string with only allowed characters for client-provided metadata inputs.
+func Data(s string, maxlen int) string {
+	if len(s) > maxlen {
+		s = s[:maxlen]
+	}
+	return reStripData.ReplaceAllString(s, "")
+}