Some convenience macros are referring to and dereferencing pointers,
and Sphinx will get a bit confused trying to interpret this as markup.
There should never be any markup intended to be interpreted in the
value of a macro definition, so we can silence this class of
warnings by treating them as literals.  (In some sense, they actually
are literals, too.)

This will cause a warning for macros that only cause a
symbol to be defined, that is, a literal "#define MACRO" with no
initializer, due to the lack of body in the inline-literal markup.
Such macros should probably be added to the exclude list for conversion
to reStructuredText in the Doxygen-Sphinx bridge, as was already
done for KRB5_OLD_CRYPTO.  Support code to programmatically omit
macros of this sort is deliberately *not* included, so that explicit
action must be taken when a new macro is to be undocumented.

Also, strip leading and trailing whitespace from the macro name,
since this causes problems with the markup.

ticket: 7447
tags: pullup
target_version: 1.11

All of rst_source/ is now just in doc/.
The krb_ prefix is stripped from the document sub-directories.
rst_tools are now just tools.

The section headers of kadmind, krb5kdc, and sserver match as conflict markers.
bigredbutton: whitespace

ticket: 7409