Rename BaseConf.New to BaseConf.Get

Since BaseConf.New could return a cached BaseConf, rather than always
constructing a new struct, I've renamed it to Get to more accurately
reflect its use. A new New() method is called by Get and always
initializes a new struct.

Signed-off-by: Jonathon Anderson <janderson@ciq.co>

internal/pkg/overlay/funcmap.go

@@ -17,7 +17,7 @@ Reads a file file from the host fs. If the file has nor '/' prefix
 the path is relative to Paths.SysconfdirTemplates in the file are no evaluated.
 */
 func templateFileInclude(inc string) string {
-	conf := warewulfconf.New()
+	conf := warewulfconf.Get()
 	if !strings.HasPrefix(inc, "/") {
 		inc = path.Join(conf.Paths.Sysconfdir, "warewulf", inc)
 	}
@@ -35,7 +35,7 @@ is the file to read, the second the abort string
 Templates in the file are no evaluated.
 */
 func templateFileBlock(inc string, abortStr string) (string, error) {
-	conf := warewulfconf.New()
+	conf := warewulfconf.Get()
 	if !strings.HasPrefix(inc, "/") {
 		inc = path.Join(conf.Paths.Sysconfdir, "warewulf", inc)
 	}