MEDIUM: log: add a new log format flag "E"
The +E mode escapes characters '"', '\' and ']' with '\' as prefix. It
mostly makes sense to use it in the RFC5424 structured-data log formats.
Example:
log-format-sd %{+Q,+E}o\ [exampleSDID@1234\ header=%[capture.req.hdr(0)]]
diff --git a/include/types/log.h b/include/types/log.h
index 35c1228..e974086 100644
--- a/include/types/log.h
+++ b/include/types/log.h
@@ -141,6 +141,7 @@
#define LOG_OPT_REQ_CAP 0x00000008
#define LOG_OPT_RES_CAP 0x00000010
#define LOG_OPT_HTTP 0x00000020
+#define LOG_OPT_ESC 0x00000040
/* Fields that need to be extracted from the incoming connection or request for