[TYPO3-english] Load plugin into subpart

[Ralf-René Schröder]

NO condition INSIDE brackets...

so it must be

temp.mainTemplate = TEMPLATE
temp.mainTemplate {
   template = FILE
   template.file = fileadmin/labfs/index.html
}
[PIDupinRootline = 2,114]
temp.mainTemplate.template.file = fileadmin/labfs/content.html
[END]
[PIDinRootline = 4]
temp.mainTemplate.template.file = fileadmin/labfs/contact.html
[END]