here's a patch that not only makes the installer accept the arguments, but also makes it use them in conjunction with the -scripted option. Previously it was hard coding the manager username and password for some reason. As well, removed some FOP stuff and added documentation for some undocumented options. -installdb is especially helpful.
Merge pull request #4 in FREEPBX/framework from feature/FREEPBX-5599-installer-doesn-t-work-when to release/2.11

* commit '8f175506dc865bfaa4377d2d55f545fdd3da89d5':
  here's a patch that not only makes the installer accept the arguments, but also makes it use them in conjunction with the -scripted option. Previously it was hard coding the manager username and password for some reason. As well, removed some FOP stuff and added documentation for some undocumented options. -installdb is especially helpful.