packages: add freebsd base mirror

Author: plowsof

contrib/depends/packages/freebsd_base.mk

@@ -1,6 +1,6 @@
 package=freebsd_base
 $(package)_version=11.3
-$(package)_download_path=https://download.freebsd.org/ftp/releases/amd64/$($(package)_version)-RELEASE/
+$(package)_download_path=http://ftp-archive.freebsd.org/mirror/FreeBSD-Archive/old-releases/amd64/$($(package)_version)-RELEASE/
 $(package)_download_file=base.txz
 $(package)_file_name=freebsd-base-$($(package)_version).txz
 $(package)_sha256_hash=4599023ac136325b86f2fddeec64c1624daa83657e40b00b2ef944c81463a4ff