Prompts based on `mkComplFunList` and `mkComplFunList'` were not
taking into account the `searchPredicate` funtion from `XPConfig`.
This was rather confusing.
We fix it by passing `XPConfig` to these functions; although
this is strictly more than they need, it makes the breaking change very
easy to fix and is also more future-proof.
It turns out that for urxvt, and most terminal, apparently, once you give a '-e' option, that's it.
They will not interpret anything after that as anything but input for /bin/sh, so if you wanted to go 'runInTerm "'screen -r session' -title IRC"',
you were SOL - the -title would not be seen by urxvt. This, needless to say, is bad, since then you can't do stuff like set the title which means
various hooks and extensions are helpless. This patch adds an extra options argument which is inserted *before* the -e. If you want the old behaivour,
you can just go 'runInTerm "" "executable"', but now if you need to do something extra, 'runInTerm "-title mutt" "mutt"' works fine.
This patch also updates callers.
