Fix: Possible segfault in spo_database
     when the decoded IP header is supposed to have a TCP/UDP packet but
     the decoded packet does not contain such information.
     A pointer validation check has been added and behavior has been
     changed for ICMP handling which was already considering this case but
     would lead to a processing fault. (DB_DEBUG information messages
     where also added).

Bumped: Build to 319
Add: Enable payload encoding for log_syslog_full in complete mode,
support hex(default),base64,ascii

Bumped: Build to 320
Merge pull request #67 from binf/bug-fix

Fix: Possible segfault in spo_database