Remove unused logging.hpp. Refs #1846.
security: Fix the name for INIT_LOGGER. Refs #1846.
security: In KeyChain, need to add INIT_LOGGER. Refs #1846.
sync: In ChronoSync2013, need to add INIT_LOGGER. Refs #1846.
make: In configure.ac, add liblog4cxx if HAVE_LOG4CXX. Refs #1846.
CHANGELOG: Added bug fix: Fix compiling if log4cxx is present. Refs #1846.
Merge branch 'issue/1846-compile-with-log4cxx-present'. Refs #1846.
http://redmine.named-data.net/issues/1846