Changes since ZNC-extra 0.064:

* configure now also checks for znc-config in the paths given by --prefix and --bindir.
* configure tries to use tclConfig.sh when just --enable-tcl is given.
* Updates and fixes to modtcl.
* Fixes to the replies known by route_replies.
* Added a distclean Makefile target.
* The log module now honors the user's TimezoneOffset setting.
* Replace autovoice with a hacked version of autoop.
* Use autoconf 2.63.
* Fix --with-tcl-flags to work with spaces in its argument