Problem: 'make clean' in doc did not remove *.7
Problem: 'make clean' in doc did not remove *.7

Solution: fix this.

zeromq/zproject,zeromq/zproject,hintjens/zproject,eburkitt/zproject,hintjens/zproject,paddor/zproject,taotetek/zproject,paddor/zproject,twhittock/zproject,taotetek/zproject,twhittock/zproject,taotetek/zproject,keent/zproject,zeromq/zproject,eburkitt/zproject,paddor/zproject,keent/zproject