I don't see how one particular user can decide how others should be using `Lmod`...

There should be a reasonable default, which is probably not passing any configure options, but people should be able to build Lmod as they see fit.

Enabling certain options just because the contributor uses them is wrong imho, since it makes building `Lmod` like I want to use it a lot more difficult (because I have to undo his/her decisions).