Ignore Apache log formats which are not supported.

apachedex/__init__.py

@@ -1334,7 +1334,9 @@ def main():
           key += n()
         elif fmt == '>':
           key += n()
-        char = logformat_dict[key]
+        # XXX: Consider unknown fields have no whitespaces (ie, support for
+        # quotes)
+        char = logformat_dict.get(key, r'\S*')
         expensive_char = expensive_logformat_dict.get(key, char)
       line_regex += char
       expensive_line_regex += expensive_char