* seastar ab54765...e640314 (10):
> net: enable IP_BIND_ADDRESS_NO_PORT before binding a socket during connection
> core: show address in error message for posix_listen failures
> fmt: remove submodule
> tests: fix loopback socket close() to not fail when the peer's side is already closed
> Merge "Add suffixes to target names" from Jesse
> temporary_buffer: improve documentation for alignment param requirements
> docs: Fix dependencies for split tutorial target
> deleter: prevent early memory free caused by deleter append.
> doc/tutorial.md: introduce memory allocation foreign_ptr
> Fix CLI help message (network & DPDK options)
Toolchain and configure.py updated for fmt submodule removal.