Merge remote-tracking branch 'origin/topic/dev/print-to-log'

Adjustments during merge:

- kept the UNKNOWN Log::ID as placeholder value
- changed the coverage.find-bro-logs test to check for arbitrary $path
  field values instead of just string literals
- don't force EnumVal to unsigned integer since the relevant union member
  is the signed integer and added the relevant enum values/types to
  .bif files for easier access
- compare FILE* versus file name to check for stdout equality (don't
  think it matters much, just a bit more efficient)
- minor whitespace/style tweaks

* origin/topic/dev/print-to-log:
  Added a non boolean configuration and other changes as suggested by Jon
  Allow Print Statements to be redirected to a Log# This is a combination of 3 commits.

testing/btest/scripts/base/frameworks/logging/print-log-stdout.zeek

@@ -0,0 +1,25 @@
+#
+# @TEST-EXEC: zeek -b %INPUT
+# @TEST-EXEC: btest-diff print.log
+# @TEST-EXEC: btest-diff .stdout
+# @TEST-EXEC: btest-diff otherfile
+# @TEST-EXEC: btest-diff anotherfile
+
+redef Log::print_to_log = Log::REDIRECT_STDOUT;
+
+event zeek_init()
+	{
+	local f = open("otherfile");
+	print f, "hello world ,";
+	print "hello world ,";
+	print f,2,T;
+	print 2,T;
+	close(f);
+	}
+
+event Log::log_print (rec: Log::PrintLogInfo)
+	{
+	local f = open("anotherfile");
+	print f,"from event",rec;
+	close(f);
+	}