Log Message:
swirc: update to 3.3.9.

## [3.3.9] - 2023-01-07 ##
- **Added** micro optimizations
- **Added** rules for nickname highlighting
- **Added** SASL auth mechanism: **external**
- **Added** support for the **GNU Hurd OS**
- **Added** tab completion for:
  - `/connect`
  - `/time`
  - `/version`
- **Added** the following commands:
  - `/qbot`
  - `/stats`
- **Added** the following config options:
  - `cmd_type_prot` (bool)
  - `ctcp_reply` (bool)
  - `qbot_host` (string)
  - `sasl_x509` (string)
- **Improved** tab completion for:
  - `/msg`
  - `/notice`
  - `/whois`

### Linux ###
- **Fixed** building on riscv64. Contributed by
  [Eric Long](https://github.com/hack3ric) - thanks!