Add support for IP-based bans (#1703)

* Add support for IP-based bans. Closes #1534

* Linter cleanup

models/ipAddress.go

@@ -0,0 +1,10 @@
+package models
+
+import "time"
+
+// IPAddress is a simple representation of an IP address.
+type IPAddress struct {
+	IPAddress string    `json:"ipAddress"`
+	Notes     string    `json:"notes"`
+	CreatedAt time.Time `json:"createdAt"`
+}