Don't include version in replacement source

Follow-up to #69

I had a situation where caddy/v2 v2.4.6 was in my go.mod and a replace
on it to use local caddy repo.

When I ran `xcaddy run` to test a caddy module, it failed to run because
the replace included the version v2.4.6, even though somehow the buildenv
go.mod had v2.6.1 (the latest), and the replace directive specified
@v2.4.6 only, so the replacement didn't happen.

I don't think versions in the replacement source/origin are
really that useful for xcaddy.

If experience proves this wrong, we can figure out a better solution.

cmd/main.go

@@ -292,8 +292,6 @@ func parseGoListJson(out []byte) (currentModule, moduleDir string, replacements
 			continue
 		}
 
-		src := mod.Path + "@" + mod.Version
-
 		// 1. Target is module, version is required in this case
 		// 2A. Target is absolute path
 		// 2B. Target is relative path, proper handling is required in this case
@@ -315,7 +313,7 @@ func parseGoListJson(out []byte) (currentModule, moduleDir string, replacements
 			}
 		}
 
-		replacements = append(replacements, xcaddy.NewReplace(src, dst))
+		replacements = append(replacements, xcaddy.NewReplace(mod.Path, dst))
 	}
 	for _, idx := range unjoinedReplaces {
 		unresolved := string(replacements[idx].New)

cmd/main_unix_test.go

@@ -95,12 +95,12 @@ func TestParseGoListJson(t *testing.T) {
 		t.Errorf("Unexpected module path")
 	}
 	expected := []xcaddy.Replace{
-		xcaddy.NewReplace("replacetest1@v1.2.3", "golang.org/x/example@v0.0.0-20210811190340-787a929d5a0d"),
-		xcaddy.NewReplace("replacetest2@v0.0.1", "golang.org/x/example@v0.0.0-20210407023211-09c3a5e06b5d"),
-		xcaddy.NewReplace("replacetest3@v1.2.3", "/home/work/module/fork1"),
+		xcaddy.NewReplace("replacetest1", "golang.org/x/example@v0.0.0-20210811190340-787a929d5a0d"),
+		xcaddy.NewReplace("replacetest2", "golang.org/x/example@v0.0.0-20210407023211-09c3a5e06b5d"),
+		xcaddy.NewReplace("replacetest3", "/home/work/module/fork1"),
 		xcaddy.NewReplace("github.com/simnalamburt/module", "/home/work/module"),
-		xcaddy.NewReplace("replacetest4@v0.0.1", "/srv/fork2"),
-		xcaddy.NewReplace("replacetest5@v1.2.3", "/home/work/module/fork3"),
+		xcaddy.NewReplace("replacetest4", "/srv/fork2"),
+		xcaddy.NewReplace("replacetest5", "/home/work/module/fork3"),
 	}
 	if !reflect.DeepEqual(replacements, expected) {
 		t.Errorf("Expected replacements '%v' but got '%v'", expected, replacements)

cmd/main_windows_test.go

@@ -99,12 +99,12 @@ func TestParseGoListJson(t *testing.T) {
 		t.Errorf("Unexpected module path")
 	}
 	expected := []xcaddy.Replace{
-		xcaddy.NewReplace("replacetest1@v1.2.3", "golang.org/x/example@v0.0.0-20210811190340-787a929d5a0d"),
-		xcaddy.NewReplace("replacetest2@v0.0.1", "golang.org/x/example@v0.0.0-20210407023211-09c3a5e06b5d"),
-		xcaddy.NewReplace("replacetest3@v1.2.3", "C:\\Users\\work\\module\\fork1"),
+		xcaddy.NewReplace("replacetest1", "golang.org/x/example@v0.0.0-20210811190340-787a929d5a0d"),
+		xcaddy.NewReplace("replacetest2", "golang.org/x/example@v0.0.0-20210407023211-09c3a5e06b5d"),
+		xcaddy.NewReplace("replacetest3", "C:\\Users\\work\\module\\fork1"),
 		xcaddy.NewReplace("github.com/simnalamburt/module", "C:\\Users\\work\\module"),
-		xcaddy.NewReplace("replacetest4@v0.0.1", "C:\\go\\fork2"),
-		xcaddy.NewReplace("replacetest5@v1.2.3", "C:\\Users\\work\\module\\fork3"),
+		xcaddy.NewReplace("replacetest4", "C:\\go\\fork2"),
+		xcaddy.NewReplace("replacetest5", "C:\\Users\\work\\module\\fork3"),
 	}
 	if !reflect.DeepEqual(replacements, expected) {
 		t.Errorf("Expected replacements '%v' but got '%v'", expected, replacements)