v1.15.1

UPDATED:
* Dep/go ver bumps
* gated some WIP stuff

.pdsh.wip/dshgroup/errs.go

@@ -0,0 +1,11 @@
+package dshgroup
+
+import (
+	"errors"
+)
+
+var (
+	ErrEmptyDshGroupTok    error = errors.New("empty dsh group pattern token")
+	ErrInvalidDshGrpSyntax error = errors.New("invalid dsh group file syntax")
+	ErrInvalidDshGrpPtrn   error = errors.New("invalid dsh group pattern syntax")
+)