Make install rule

Fix the build system to correctly include config.h

Remove cryptopp dependency, directly include a simple sha1 implementation

Provide a JID for IRC users, and add a stringprep dependency for this

Put utils::tolower definition in its own cpp file

Rewrite the FindIconv module cleanly

Rewrite the FindCryptopp cmake module cleanly

Use the logger everywhere

Add a logger class

fsanitize=address requires libasan, that’s a useless dependency.

Also we cannot use both this feature and valgrind at the same time.
So, I’ll just specify this flag myself when I need it, this doesn’t
need to be there by default

Merge branch 'epolletc'

Let the user choose the poller to use through cmake POLLER option

Use ccmake, or cmake -i, or cmake -DPOLLER=EPOLL, for example

Link with pthread, required by cryptopp

Basic handling of modes, both ways

Add a Config module, and use it to get the password from a file

Fix the include of the config.h

And actually use the values found by cmake

Properly detect iconv features to compile

Use the Expat library directly instead of relying on expatpp

And now we handle namespaces, yay.
And a nice little test.

Check UTF-8 encoding, and convert strings to UTF-8

Handle conversion errors properly by inserting � instead.  Add a binary
header to provide portable way to write binary literals (I like them) Also
add a test file.  ref #2404