Add config option for shared state dir

Signed-off-by: jcsiadal <jeremy.c.siadal@intel.com>

Changes default share to /srv/warewulf
Update specfile
Some changes to match Golang standards

cmd/config_defaults/config_defaults.go

@@ -0,0 +1,26 @@
+package main
+
+// Regenerates the default configuration files
+// Keeps the current content and adds missing default values
+// Won't create a new file, but will update a blank file
+
+//TODO: Add nodes.conf
+
+import (
+	"fmt"
+	"github.com/hpcng/warewulf/internal/pkg/warewulfconf"
+)
+
+func main() {
+	tmpConf, err := warewulfconf.New()
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	err = tmpConf.Persist()
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+}