Remove --disable-transparent configure option?
Right now --enable-transparent is the default in ./configure.
I don't know of anyplace that disables it.
And that means that if there's any place that fails to build with it enabled, we would have heard about it, right?
So, the only possible remaining reason to disable it is if we don't want that extra code in Tor, for security reasons? Are there libraries that we choose not to link if it's disabled? Or is it just a couple of lines of code that we run or don't run?
(I noticed this option again while noticing that FreeBSD's Tor port ( https://trac.torproject.org/projects/tor/attachment/ticket/7734/FreeBSD_Tor_port_config.png ) gives the user the option of choosing --disable-transparent, along with other things like --enable-bufferevents and --enable-instrument-downloads that are distractions at best and downright dangerous sometimes.)