Compile RuntimeException with exceptions enabled.
Fix JIRA-ROOT-5488. The matrices used by the Td and Tm PDF text operators (used to position and rotate text) cannot be concatenate with the current transformation matrix. This produced wrong slanted text for greek letters when the text angle was not zero. Now the operator "cm" is used instead of Td and Tm, allowing to concatenate the text transformation  matrix with the matrix used slant the text.
TPDF
fix a typo
Extract the enum decl without recursing, but iteration over decl context.
Just reply on simplisticCast; register temporary. Fixes ROOT-5316.
Fix capabilities files generation

The generation of capabilities files was added.
CMS indeed uses those to feed the FW plugin manager, which is
very similar to the good Old SEAL plugin manager.
DGRs can have a decl to be emitted, another not to be emitted.

When this oce comes from a #include through ParseForModules():
class A{} g;
A should be emitted, but not g.
This is now tested in roottest/root/meta/templateAutoload.