Log Message:
swirc: update to 3.3.6.

## [3.3.6] - 2022-10-05 ##
- **Added** cryptographic functions
- **Added** subcommand `passwd_s` to `/sasl` which can be used to
  securely store encrypted SASL passwords in `swirc.conf`. The
  encryption technique practice the use of **AES** and **SHA**.
- **Added** tab completion for
  - `/msg`
  - `/notice`
  - `/sasl`
- **Changed** the program behavior to
  - jump between ICB and IRC mode depending on the port number
  - **not** create core dump files if `NDEBUG` is defined at compile time
  - **not** echo the server password on input (command line flag `-p`)
- **Fixed** a bug so if a connection attempt fails it's possible to
  reconnect again after `/disconnect`.
- **Fixed** code duplication
- **Fixed** insufficient out of range check, off-by-one, in command
  `/unignore`.
- Made small improvements
  - **Added** usage of C++17 fallthrough attr
  - **Added** usage of `PATH_MAX`
  - **Added** usage of `__func__` instead of hardcoding it (for example in
    error messages)
  - **Fixed** redundant checks
  - Reduced scope of variables
  - Switched to usage of 'sizeof' in `BZERO()` calls
  - ...
- Prevented the config hash table from being paged to the swap area.
- **Rewrote** `commands/sasl.c` in C++
- **Updated** preprogrammed IRC servers
  - **Added** port numbers and server descriptions
  - **Added** the [IRCNow](https://ircnow.org/) network
  - **Deleted** the [Blitzed](http://blitzed.org/) network