The patch should use struct session, which is non-existent
in 1.5, so at least make session_storage_destroy a bit faster.

Also don't call sfree_delayed if snapshot process isn't started, closes #118

#104: -? as --help alias(also for tarancheck), -v -> -V, += number/string in description (need to patch gopt_help += 9 symbols)

Fedora includes debug package by default and will
trigger an error if sees the duplicate.

binutils-devel for build.