config.l: dependency checks for booleans

Disable the boolean option that has its dependency disabled.
This fixes the case where GENERATE_TREE_VIEW is set to TRUE
even when its dependency GENERATE_HTML is FALSE.

Signed-off-by: Adrian Negreanu <adrian.m.negreanu@intel.com>
Reverted #132 after submitter reported that it did not work
Bug 726294 - Markdown Extra - fenced code block: '>' before tab width parsed as block quote
Add index support to context
Merge branch 'master' of https://github.com/groleo/doxygen-1 into groleo-master
Removed message, minor restructuring
Merge branch 'master' of github.com:doxygen/doxygen
Merge branch 'master' of github.com:doxygen/doxygen
Merge branch 'master' of github.com:doxygen/doxygen
Merge branch 'template'
Disabled config dependency check to avoid regression