[TYPO3-50-general] Advanced page handling for the classic page module

[Tapio Markula]

Hi

TemplaVoila has quite working system in pagemodule.
For example, when the doktype is 'shortcut' it doesn't show content.

The system has endeed some flaws.
Content rendering should allow for shortcut in some circumstances and
TemplaVoila misses function for 'spacer'.

I have made corresponding system for the classic page module and I have 
added some improvements like testing if fields 'shorcut' and 
'content_from_pid' have valid values - if they don't have, then an error 
message.

I added also hooks to control doktype values, which are added by some 
plugin. Also for pages, which has some plugin (field 'module'), can get 
extra information.

Test for field 'content_from_pid' added for undefined page types - 
function name for those will be 'renderDoktype_1001' - unknown or 
undefined doktype has been reset as fake doktype '1001'.

Works fine in test environment - not public, but I can give someone 
account to
http://212.79.240.130/~tapio2/typo3/
evaluation version also available