v1.10.3

ADDED:
* netx now has a ton of netmask conversion functions for IPv4 netmasks.
  (IPv6 doesn't really *have* netmasks, so it was intentionally
  excluded).

netx/errors.go

@@ -0,0 +1,10 @@
+package netx
+
+import (
+	`errors`
+)
+
+var (
+	ErrBadMask4Str error = errors.New("netx: unknown/bad IPv4 netmask dotted quad")
+	ErrBadNetFam   error = errors.New("netx: unknown/bad IP network family")
+)