Inconsistent information about Search keybinding

[eugenezastrogin]

Current version of README states that search binding is ctrl-S

Search	C-s

And it seems to be the default case in the source code. But default keys file from config.tar.gz actually overrides it with simple S:

[filelist]
Search=S

I would make a PR to fix this, but it is not clear what the default should be from those 3 sources...