Don't check for file presence on inline files

Don't check for file presence on inline files

The configuration file supports inline files for --ca, --cert, --dh,
--extra-certs, --key, --pkcs12, --secret and --tls-auth.  When this
is used, the filename is set to [[INLINE]] (defined by INLINE_FILE_TAG).

If the filename is set to INLINE_FILE_TAG for these options, don't
call check_file_access().

[v2 Simplify the code, using a flag to check_file_access()]

Signed-off-by: David Sommerseth <davids@redhat.com>
Acked-by: Gert Doering <gert@greenie.muc.de>