BF: fail2ban-regex adding duplicate lines with each regex

This issue was caused by the fact that every "line" is processed for each
regex, meaning each line was duplicated for every regex. This caused
duplicate fail matches and the buffer filling too quickly and possibly
missing failures.

bin/fail2ban-regex

@@ -277,7 +277,12 @@ class Fail2banRegex:
 					return False
 			finally:
 				self.__filter.delFailRegex(0)
+				try:
+					del self.__filter._Filter__lineBuffer[-1]
+				except IndexError:
+					pass
 				logging.getLogger("fail2ban").setLevel(logging.CRITICAL)
+		self.__filter.processLine(line)
 		for regex in self.__ignoreregex:
 					self.__filter.delIgnoreRegex(0)