A Host Has No Name

• Using --hostname and --force together would not actually skip the hostname confirmation step, and so it was impossible to run unattended, without having the hostname already correctly set on the system.
• Setting hostname was actually broken on some systems some of the time (it depended on what was already in /etc/hosts).
• Hostname gets added to /etc/hostname. This exhibited as a hostname: Name or service not known error during configuration of ProFTPd, and could cause quirky behavior for mail.
• Ctrl-C works as expected now in user input dialogs (i.e. you can exit the installer using Ctrl-C when it is prompting for input).
• Cosmetic cleanups, especially when exiting with Ctrl-C, but also when exiting due to errors. Spinner artifacts should be cleaned up properly in all circumstances instead of just some.