2.3.0

Added

• Add '--enable-debug' flag to configure script to simplify debug builds.
  This relies on the AX_CHECK_ENABLE_DEBUG autoconf archive macro.

Canged

• Replaced custom dynamic TCTI loading code with libtss2-tctildr from
  upstream tpm2-tss repo.

Fixed

• Explicitly set '-O2' optimization when using FORTIFY_SOURCE as required.