fmt: Code formatting

src/lib/nccpp/Ncurses.cpp

src/lib/nccpp/Ncurses.hpp

src/lib/nccpp/Subwindow.hpp

src/lib/nccpp/Window.cpp

src/lib/nccpp/constants.hpp

src/mumta/evloop.cpp

src/net/address.hpp

src/net/async_fd.hpp

src/net/async_server.cpp

src/net/connection_client.cpp

src/net/connection_client.hpp

src/net/connection_line_buffer.cpp

src/net/connection_line_buffer.hpp

src/net/ioqueue.cpp

src/net/ioqueue.hpp

src/net/netio_exception.cpp

src/net/netio_exception.hpp

src/net/socketaddress.hpp

src/net/tcp_client.cpp

src/net/tcp_client.hpp