pfSense

Move terminal config from cons25 to xterm, same used by FreeBSD

Change serial terminal type to vt100, same FreeBSD uses

Remove our own copy of /etc/ttys

Improve interactive shell detection to cover other terminal types

Remove sshd_config from main repo, it's always replaced by /etc/sshd

Remove root directory from main repo, config files will be copied during boot

Remove /root/.gitsync_merge.sample

Copy users config files from skeleton dir

Every time user is added or modified, make sure all default config
files are copied over from /etc/skel to user's home. It will make sure
users will always get the last version of these files

Improve readability

Add dot.hushlogin to skeleton directory to create file for all new users and avoid them to see motd