awstats_configure.pl not available on gentoo and also not even a good idea to use because it breaks our webserver config and more; fixes #1085

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
add additional commands for postfix installation on freebsd, fixes #1155

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
add -i to the sendmail parameter list (php-default is -t -i anyway), thx to Psi|4ward. A note will be shown on the update screen later; fixes #1134

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>