chore: switch database engine to sqlite (fixes #9954) (#9965)

Switch the database from LevelDB to SQLite, for greater stability and
simpler code.

Co-authored-by: Tommy van der Vorst <tommy@pixelspark.nl>
Co-authored-by: bt90 <btom1990@googlemail.com>

lib/build/build.go

@@ -18,7 +18,7 @@ import (
 	"time"
 )
 
-const Codename = "Gold Grasshopper"
+const Codename = "Hafnium Hornet"
 
 var (
 	// Injected by build script
@@ -28,6 +28,9 @@ var (
 	Stamp   = "0"
 	Tags    = ""
 
+	// Added to by other packages
+	extraTags []string
+
 	// Set by init()
 	Date        time.Time
 	IsRelease   bool
@@ -43,6 +46,11 @@ var (
 		"STNORESTART",
 		"STNOUPGRADE",
 	}
+	replaceTags = map[string]string{
+		"sqlite_omit_load_extension": "",
+		"osusergo":                   "",
+		"netgo":                      "",
+	}
 )
 
 const versionExtraAllowedChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-. "
@@ -108,8 +116,23 @@ func TagsList() []string {
 	if Extra != "" {
 		tags = append(tags, Extra)
 	}
+	tags = append(tags, extraTags...)
+
+	// Replace any tag values we want to have more user friendly versions,
+	// or be removed
+	for i, tag := range tags {
+		if repl, ok := replaceTags[tag]; ok {
+			tags[i] = repl
+		}
+	}
 
 	sort.Strings(tags)
+
+	// Remove any empty tags, which will be at the front of the list now
+	for len(tags) > 0 && tags[0] == "" {
+		tags = tags[1:]
+	}
+
 	return tags
 }
 
@@ -124,3 +147,8 @@ func filterString(s, allowedChars string) string {
 	}
 	return res.String()
 }
+
+func AddTag(tag string) {
+	extraTags = append(extraTags, tag)
+	LongVersion = LongVersionFor("syncthing")
+}