Renamed backend to driver

cmd/config.toml

@@ -1,5 +1,5 @@
 [database]
-backend = "sqlite3"
+driver = "sqlite3"
 url = "gopay.db"
 ssl = false
 max = 30

internal/config/config.go

@@ -8,11 +8,11 @@ type Config struct {
 
 // Database configuration
 type Database struct {
-	Backend string `toml:"backend"`
-	URL     string `toml:"url"`
-	SSL     bool   `toml:"ssl"`
-	Max     int    `toml:"max"`
-	Idle    int    `toml:"idle"`
+	Driver string `toml:"driver"`
+	URL    string `toml:"url"`
+	SSL    bool   `toml:"ssl"`
+	Max    int    `toml:"max"`
+	Idle   int    `toml:"idle"`
 }
 
 // Log configuration