Pwntools-elf-only

- [2202][2202] Fix `remote` and `listen` in sagemath
- [2117][2117] Add -p (--prefix) and -s (--separator) arguments to `hex` command
- [2221][2221] Add shellcraft.sleep template wrapping SYS_nanosleep
- [2219][2219] Fix passing arguments on the stack in shellcraft syscall template
- [2212][2212] Add `--libc libc.so` argument to `pwn template` command

[2202]: https://github.com/Gallopsled/pwntools/pull/2202
[2117]: https://github.com/Gallopsled/pwntools/pull/2117
[2221]: https://github.com/Gallopsled/pwntools/pull/2221
[2219]: https://github.com/Gallopsled/pwntools/pull/2219
[2212]: https://github.com/Gallopsled/pwntools/pull/2212

- [2185][2185] make fmtstr module able to create payload without $ notation
- [2103][2103] Add search for libc binary by leaked function addresses `libcdb.search_by_symbol_offsets()`
- [2177][2177] Support for RISC-V 64-bit architecture
- [2186][2186] Enhance `ELF.nx` and `ELF.execstack`
- [2129][2129] Handle `context.newline` correctly when typing in `tube.interactive()`

[2185]: https://github.com/Gallopsled/pwntools/pull/2185
[2103]: https://github.com/Gallopsled/pwntools/pull/2103
[2177]: https://github.com/Gallopsled/pwntools/pull/2177
[2186]: https://github.com/Gallopsled/pwntools/pull/2186
[2129]: https://github.com/Gallopsled/pwntools/pull/2129

- [2214][2214] Fix bug at ssh.py:`download` and `download_file` with relative paths
- [2241][2241] Fix ssh.process not setting ssh_process.cwd attribute

[2214]: https://github.com/Gallopsled/pwntools/pull/2214
[2241]: https://github.com/Gallopsled/pwntools/pull/2241