Merge master -> box-switch_mode

README

cfg/core_cfg.cfg_tmpl

cfg/tarantool_feeder_cfg.cfg

cfg/tarantool_feeder_cfg.h

connector/perl/MANIFEST

connector/perl/Makefile.PL

connector/perl/lib/MR/IProto.pm

connector/perl/lib/MR/SilverBox.pm

connector/perl/lib/MR/Storage/Const.pm

connector/perl/t/TBox.pm

connector/perl/t/box.pl

connector/perl/t/box_tree.pl

connector/ruby/README

connector/ruby/box.rb

connector/ruby/iproto.rb

core/admin.m

core/admin.rl

core/log_io.m

core/salloc.m

core/tbuf.m