fix the caching of recently validated certs

The recently_validated_certs table was being checked for entries, but
missing hashes were not being added to it after validation.
change Notice::suppressing to be a table of times

Instead of storing the entire notice in Notice::suppressing,
just store the time the notice should be suppressed until.

This has the same functionality, except that end_suppression can no
longer be generated.
Include file information in notices

Add file_desc and file_mime_type information to notice output if it
exists in the notice.
Integrate libmagic 5.16 via CMake ExternalProject.

- Bumps CMake requirement to CMake 2.8.
- Bro now always relies on builtin/shipped magic library/database.
Don't use LOG_* options to ExternalProject_Add if not supported.

They're in CMake 2.8.3 and greater, but not strictly necessary for the
build to work -- they just make build output a bit nicer.
BIT-867 - Support GRE tunnel decapsulation.

This includes enhanced GRE headers.  GRE tunnels are treated just like
IP-in-IP tunnels by parsing past the GRE header in between the delivery
and payload IP packets.
Simplify FragReassembler memory management.
Merge remote-tracking branch 'origin/topic/jsiwek/libmagic-integration'

* origin/topic/jsiwek/libmagic-integration:
  Don't use LOG_* options to ExternalProject_Add if not supported.
  Integrate libmagic 5.16 via CMake ExternalProject.

BIT-1116 #merged
Merge remote-tracking branch 'origin/topic/jazoff/suppression'

* origin/topic/jazoff/suppression:
  change Notice::suppressing to be a table of times

BIT-1115 #merged
Merge remote-tracking branch 'origin/topic/jazoff/ssl-validation-fix'

* origin/topic/jazoff/ssl-validation-fix:
  fix the caching of recently validated certs

BIT-1114 #merged
Merge remote-tracking branch 'origin/topic/jazoff/notice_file_info'

* origin/topic/jazoff/notice_file_info:
  Include file information in notices

BIT-1113 #merged

I'm wondering if there's a way to test creating these emails ... ?
Merge remote-tracking branch 'origin/topic/jsiwek/gre'

* origin/topic/jsiwek/gre:
  Simplify FragReassembler memory management.
  BIT-867 - Support GRE tunnel decapsulation.

BIT-867 #merged
Updating submodule(s).

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