ceph_argparse_flag has no regular 3rd parameter.

With clang warning: 'va_start' has undefined behavior with reference
types, noticing copy-paste mistake on ceph_argparse_flag.

Signed-off-by: Thorsten Behrens <tbehrens@suse.com>
(cherry picked from commit 0c7c7223a2beb4ffb953d89d316f87d350677063)
Variable length array of std::strings (not legal in C++) changed to std::vector<std::string>

Signed-off-by: Daniel J. Hofmann <daniel@trvx.org>
(cherry picked from commit 08a4e8889783673436972a979c2fc780466893c8)
[warning] Fix deprecation warning from gperftools.
Hack-fix crashing tcmalloc on sle11.

This fixes bnc#882430 in a not-so-nice way. Needs configure
rework with a --tcmalloc-minimal option or somesuch.