minor ChangeLog text tweaks and one typo fix
Revert "[libfko] Have 'make install' run ldconfig if basic fwknop/fwknopd -h exec fails"

This reverts commit f55b89c867ab63aaf69daae0aec0c19f1c52d521.

Damien recommended not having 'make install' run ldconfig since it breaks an RPM
build of fwknop, and most package managers should be doing this step anyway.