sysutils/jtransfer: New port: Securely transfer files between jails

jtransfer is a lightweight tool for reading a file from a FreeBSD jail
and writing it to standard output, or for reading from standard input and
writing the content as a file inside a FreeBSD jail. The transfer is
implemented essentially using a standard pipe(2), following the typical
Unix way.

WWW: https://github.com/DtxdF/jtransfer/

MFH: 2026Q4