FreeBSD uses libspnav, just like a Linux does, so all the
conditional code addressing the spnav APIs should be used
on FreeBSD, too.
Unfortunately, the logic was not consistent in all places:
sometimes we had "#ifdef", sometimes "#if defined" and
sometimes it was negated as "#ifndef". To make the intention
clearer across both Linux and FreeBSD, I unified all places
to a "#if defined(__linux__) || defined(__FreeBSD__)".
If we get another OS latching onto the same logic, we should
introduce a simple flag for this, but for only two OSes I
decided against adding central logic for this.
Christoph Moench-Tegeder
129995acbd