adding mrbrdo to AUTHORS.md for kernel hot-switching
core/misc: rename set_poolname() to set_pool_name().
config: use get_pool_name() in set_pool_algorithm() and set_pool_nfactor().
config: allow specifying per-pool algorithm with `--algorithm` instead of `--pool-algorithm`.

This will probably only work with config file, though, since it relies
on json_array_index.