Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

sh/tests: Add a second kind of binary scripts without #!

One of the reasons for git commit
e0f5c1387df23c8c4811f5b24a7ef6ecac51a71a was to make "actually portable
executables" work. Add a test that

sh/tests: Add a second kind of binary scripts without #!

One of the reasons for git commit
e0f5c1387df23c8c4811f5b24a7ef6ecac51a71a was to make "actually portable
executables" work. Add a test that is more like those.

MFC after: 1 week

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