Removed possibility of reinstalling Instances

- http://en.wikipedia.org/wiki/SPDY

- Directive snippets can now be made available to clients; clients can select an available directive snippet for a website - the appropriate snippet will then be written to the vhost configuration file. This is useful for example on nginx where clients have no access to the Options tab of a website.

(nginx still missing)

- Implemented FS#3308 - PATH placeholder in directive snippets (placeholder is named {DOCROOT}, like for nginx).

removed unnecessary bak-files

Completly same functionality as VHost-Subdomain, not to disable if already existing vhostalias-somains in system.

- nginx pm settings: values were limited to 3 figures (so max. value was 999), increased this to 6 figures.

- Added fields to client, reseller and website to show when a record was added and by which user

- nginx: added {DOCROOT} and {FASTCGIPASS} placeholders to directive snippets and nginx Directives fields.

http://www.howtoforge.com/forums/showthread.php?t=62691

Reverted SVN trunk back to revision 3938 to remove changes in default theme an a replacement of the ispconfig logo.

- Added backup size to web backups