Merge remote-tracking branch 'origin/topic/awelzel/mmdb-fix-and-tests'

* origin/topic/awelzel/mmdb-fix-and-tests:
  base/frameworks/spicy: Do not load base/misc/version
  btest/core/mmdb: Basic lookup_autonomous_system / lookup_location tests
  btest/files: Add mmdb testing databases and generator code
  zeek.bif: Switch mmdb stale check to network_time
  Fix mmdb pointer destruction

(cherry picked from commit 44b67894ac)

scripts/base/frameworks/spicy/init-framework.zeek

@@ -1,5 +1,3 @@
-@load base/misc/version
-
 # doc-common-start
 module Spicy;
 

scripts/base/init-bare.zeek

@@ -1107,6 +1107,11 @@ type geo_autonomous_system: record {
 ## The directory containing MaxMind DB (.mmdb) files to use for GeoIP support.
 const mmdb_dir: string = "" &redef;
 
+## Sets the interval for MaxMind DB file staleness checks. When Zeek detects a
+## change in inode or modification time, the database is re-opened. Setting
+## a negative interval disables staleness checks.
+const mmdb_stale_check_interval: interval = 5min &redef;
+
 ## Computed entropy values. The record captures a number of measures that are
 ## computed in parallel. See `A Pseudorandom Number Sequence Test Program
 ## <http://www.fourmilab.ch/random>`_ for more information, Zeek uses the same