GH-1497: Support CRLF line-endings in Zeek scripts and signature files

testing/btest/language/crlf-parsing.zeek

@@ -0,0 +1,35 @@
+# @TEST-EXEC: zeek -b %INPUT >out
+# @TEST-EXEC: btest-diff out
+# @TEST-DOC: Checks that CRLF line endings work in zeek/signature files
+# Note the test file itself uses CRLFs and .gitattributes has an entry
+# to ensure preservation of the CRLFs.
+
+@TEST-START-FILE test.sig
+signature blah
+	{
+	ip-proto == tcp
+	src-port == 21
+	payload /.*/
+	event "matched"
+	}
+@TEST-END-FILE
+
+@TEST-START-FILE test.zeek
+event zeek_init()
+	{
+	print "zeek_init";
+	}
+@TEST-END-FILE
+
+@load test.zeek
+@load-sigs test.sig
+
+print "first hello";
+
+@if ( T )
+	print "hello T";
+@else
+	print "hello F";
+@endif
+
+print "last hello";