Rename BuildFrontendFunc to BuildFrontend

For consistency with other functions supplied in Config.

config.go

@@ -36,7 +36,7 @@ type Config struct {
 	Password      string
 	TLSConfig     *tls.Config // nil disables TLS
 	DialFunc      DialFunc    // e.g. net.Dialer.DialContext
-	BuildFrontendFunc BuildFrontendFunc
+	BuildFrontend BuildFrontendFunc
 	RuntimeParams map[string]string // Run-time parameters to set on connection as session default values (e.g. search_path or application_name)
 
 	Fallbacks []*FallbackConfig
@@ -165,7 +165,7 @@ func ParseConfig(connString string) (*Config, error) {
 		User:                 settings["user"],
 		Password:             settings["password"],
 		RuntimeParams:        make(map[string]string),
-		BuildFrontendFunc:    makeDefaultBuildFrontendFunc(),
+		BuildFrontend:        makeDefaultBuildFrontendFunc(),
 	}
 
 	if connectTimeout, present := settings["connect_timeout"]; present {

pgconn.go

@@ -174,7 +174,7 @@ func connect(ctx context.Context, config *Config, fallbackConfig *FallbackConfig
 		func() { pgConn.conn.SetDeadline(time.Time{}) },
 	)
 
-	pgConn.frontend = config.BuildFrontendFunc(pgConn.conn)
+	pgConn.frontend = config.BuildFrontend(pgConn.conn)
 
 	startupMsg := pgproto3.StartupMessage{
 		ProtocolVersion: pgproto3.ProtocolVersionNumber,