fix update procedure for users who upgraded from syscp (the database field which is to be dropped does not exist for them, just in fresh installs), fixes #1278

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
change default path of custom-ssl-certificates as too many people can't read. Also, don't let updaters specify '/' (result of an empty value) as custom-ssl path and let the cron only clean the custom-ssl-path of ssl is enabled (just in case), refs #1279

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
output nicer error's also in webftp-script

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
Merge pull request #127 from BNoiZe/master

history.go(-1) fix
Some CSS fixes and header improvements