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between make-variable-buffer-local and make-local-variable.  Generalize.

(c-offsets-alist): Three new syntactic symbols: innamespace,
namespace-open, namespace-close.  These support C++ namespace blocks.
Also, new syntactic symbol cpp-macro-cont, by default bound to
c-lineup-dont-change.  This symbol is assigned to subsequent lines of
a multi-line C preprocess macro definition.

(c-style-alist): "jdk" style for conformance with Sun's JDK style.

(c-set-style-2, c-initialize-builtin-style): Don't special case
"cc-mode", it's a derived style.  Fix setup of derived style
"cc-mode".  Introduce the new default style "user" which contains all
user customizations.