MINOR: filters: Add an filter example
The "trace" filter has been added. It defines all available callbacks and for
each one it prints a trace message. To enable it:
listener test
...
filter trace
...
diff --git a/Makefile b/Makefile
index b389644..8087eb1 100644
--- a/Makefile
+++ b/Makefile
@@ -751,7 +751,7 @@
src/acl.o src/sample.o src/memory.o src/freq_ctr.o src/auth.o src/proto_udp.o \
src/compression.o src/payload.o src/hash.o src/pattern.o src/map.o \
src/namespace.o src/mailers.o src/dns.o src/vars.o src/filters.o \
- src/flt_http_comp.o
+ src/flt_http_comp.o src/flt_trace.o
EBTREE_OBJS = $(EBTREE_DIR)/ebtree.o \
$(EBTREE_DIR)/eb32tree.o $(EBTREE_DIR)/eb64tree.o \