* Remove obsolete LICENCE.txt (which was for snprintf reimplementation).
* Remove obsolete references to Cendio (for old ipaddr.py).
* Build system: debian/rules: Provide build-arch and build-indep targets.
* Remove obsolete LICENCE.txt (which was for snprintf reimplementation).
* Remove obsolete references to Cendio (for old ipaddr.py).
* Build system: debian/rules: Provide build-arch and build-indep targets.