Use File.exist? instead of File.exists?

File.exists? is deprecated in Ruby 2.1+.
Update openssl098 to 0.9.8za

Closes #455.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
ruby182: Fix `--with-suffix`

Closes #452.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
ruby186: Fix `--with-suffix`

Closes #451.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
bash-completion2: use patch DSL
bash-completion2: add debian patch to fix completion on an empty line

Fixes #456.