[bug] gftp does not compile with format-security enabled in gcc/clang

[AndersonTorres]

Hello, people! I am Anderson, a member of Nixpkgs team.

While updating to the latest tagged version, I have found a small bug: gftp does not compile with hardened options enabled.

Here are the building logs:

• GCC
• Clang

By disabling them, the build runs fine.