Switch to Static-Built-Using field and substvar

This field was introduced in dpkg 1.21.3 to replace the Built-Using
field for languages that work primarily by statically linking, where
this embedding has no concerns due to license terms.

The substvar was introduced in dh-golang 1.55, which is already part of
the current Debian stable release (bookworm).

Author: guillemj

Diff for: check_depends_test.go

@@ -36,8 +36,8 @@ Architecture: any
 Depends:
  ${misc:Depends},
  ${shlibs:Depends},
-Built-Using:
- ${misc:Built-Using},
+Static-Built-Using:
+ ${misc:Static-Built-Using},
 Description: read your RSS feeds from your terminal
  Terminews is a terminal based application (TUI)
  that allows you to manage RSS resources and display their news feeds.

Diff for: template.go

@@ -177,7 +177,7 @@ func addProgramPackage(f *os.File, gopkg, debProg string) {
 	fmt.Fprintf(f, "Architecture: any\n")
 	deps := []string{"${misc:Depends}", "${shlibs:Depends}"}
 	fprintfControlField(f, "Depends", deps)
-	fmt.Fprintf(f, "Built-Using: ${misc:Built-Using}\n")
+	fmt.Fprintf(f, "Static-Built-Using: ${misc:Static-Built-Using}\n")
 	addDescription(f, gopkg, "(program)")
 }