devel/libhtp: Update to 0.5.21 * Update PORTVERSION and distinfo checksum (0.5.21) [1] * Modernise test target (Use TEST_TARGET) https://github.com/OISF/libhtp/blob/0.5.21/ChangeLog PR: 210490 [1] Submitted by: Franco Fichtner <franco opnsense org> [1]