convert *_inline attributes to bool

convert *_inline attributes to bool

Carrying around the INLINE_TAG is not really efficient,
because it requires a strcmp() to be performed every
time we want to understand if the data is stored inline
or not.

Convert all the *_inline attributes to bool to make the
logic easier and checks more efficient.

Signed-off-by: Antonio Quartulli <a@unstable.cc>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Message-Id: <20200507135909.21227-1-a@unstable.cc>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg19854.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>