Update parameters.rst with max_allowed_packet
Update parameters.rst with maxlocalattachment
Update faq.rst with SELinux and mails
Update faq.rst with link to httpd_can_sendmail
Note on deactivating KeepAlive added
synced Directory-config with non-Windows
Update essential-post-install-config.rst

Added some notes about sendmail.exe, because Sendmail may be usefuk for that even in 2014.
Merge branch 'docs-relicensing' of git://github.com/tschoening/bugzilla-docs into tschoening-docs-relicensing

Conflicts:
	docs/en/rst/administering/parameters.rst
Merge branch 'tschoening-docs-relicensing' into docs-relicensing