BUG: -o pipefail is not work on FreeBSD's /bin/sh. because it isn't bash

[sheo0147]

Vuls supports FreeBSD just now.
It is awesome. Very very thanks to the work!

I found 1 problem.

see following line.
DEBU[0000] SSH executed. cmd: set -o pipefail; uname, status: <nil>

This line is one of the debug log.

I think vuls assumes that target hosts shell is bash, but FreeBSD's shell is not bash.

So, on FreeBSD, you cannot use -o pipefail option.

[kotakanbe]

• Run with csh
  Fixed in Enable to detect vulnerabilities on FreeBSD #98
  Now vuls execute commands without -o pipefail option on FreeBSD.
  You don't need to create a user with bash login shell.
• non-root privilege
  There is no need to use root privilege user on FreeBSD servers.
  Vuls can scan using non-root users on FreeBSD.

(root privilege is needed on Amazon, CentOS, RHEL, Ubuntu and Debian for now)