Simplify syntax for negated log domains

Previously if you wanted to say "All messages except network
messages", you needed to say "[*,~net]" and if you said "[~net]" by
mistake, you would get no messages at all.  Now, if you say "[~net]",
you get everything except networking messages.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/common/log.c b/src/common/log.c
index 2fef2cc5d9..28fca4eaca 100644
--- a/src/common/log.c
+++ b/src/common/log.c
@@ -919,7 +919,10 @@ parse_log_severity_config(const char **cfg_ptr,
       smartlist_free(domains_list);
       if (err)
         return -1;
-      domains &= ~neg_domains;
+      if (domains == 0 && neg_domains)
+        domains = ~neg_domains;
+      else
+        domains &= ~neg_domains;
       cfg = eat_whitespace(closebracket+1);
     } else {
       ++got_an_unqualified_range;