Fix version parsing for various shells

[oalders]

$  ksh --version
  version         sh (AT&T Research) 93u+ 2012-08-01

$ rbash --version
GNU bash, version 5.0.17(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2019 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Look into dash. May need to add dpkg parsing.

dpkg -s dash
Package: dash
Essential: yes
Status: install ok installed
Priority: required
Section: shells
Installed-Size: 212
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Architecture: amd64
Multi-Arch: foreign
Version: 0.5.10.2-6
Depends: debianutils (>= 2.15), dpkg (>= 1.19.1), debconf (>= 0.5) | debconf-2.0
Pre-Depends: libc6 (>= 2.14)
Description: POSIX-compliant shell
 The Debian Almquist Shell (dash) is a POSIX-compliant shell derived
 from ash.
 .
 Since it executes scripts faster than bash, and has fewer library
 dependencies (making it more robust against software or hardware
 failures), it is used as the default system shell on Debian systems.
Original-Maintainer: Andrej Shadura <andrewsh@debian.org>
Homepage: http://gondor.apana.org.au/~herbert/dash/