document FreeBSD fetch(1) support

README.md

@@ -2,8 +2,9 @@
 ## Usage
 This program depends on [p7zip](https://github.com/jinfeihan57/p7zip), 
 a POSIX shell, a [mktemp](https://man.openbsd.org/mktemp.1) implementation, 
-and a downloader program which can be any of BSD ftp (recommended),
+and a downloader program which can be any of BSD ftp,
 [curl](https://github.com/curl/curl),
+[fetch](https://man.freebsd.org/cgi/man.cgi?query=fetch),
 or [wget](https://www.gnu.org/software/wget/).
 
 Simply run the command: