Made the IsValidHost checks configurable

data/hostserv.example.conf

@@ -64,6 +64,34 @@ hostserv
 	 * The name of the client that should be HostServ.
 	 */
 	name = "HostServ"
+
+	/*
+	 * The characters allowed in a vhost. Changing this is not recommended unless
+	 * you know for sure your IRCd supports whatever characters you are wanting to use.
+	 * Telling services to set a vhost containing characters your IRCd disallows could
+	 * potentially break the IRCd and/or Services. Note these are 1 byte characters, so
+	 * UTF-8 characters will not work.
+	 *
+	 * It is recommended you DON'T change this.
+	 */
+	vhost_chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJMLMNOPQRSTUVWXYZ0123456789.-"
+
+	/*
+	 * If set, allows vhosts to not contain dots (.).
+	 * Newer IRCds generally do not have a problem with this, but the same warning as
+	 * vhost_chars applies.
+	 *
+	 * It is recommended you DON'T change this.
+	 */
+	allow_undotted_vhosts = false
+
+	/*
+	 * The characters that are not allowed to be at the very beginning or very ending
+	 * of a vhost. The same warning as vhost_chars applies.
+	 *
+	 * It is recommended you DON'T change this.
+	 */
+	disallow_start_or_end = ".-"
 }
 
 /*