Make /help useful + plugin api to register/unregister help commands

[Szabolcs Molnár]

Currently the DC++ /help command shows nothing useful information on screen:

[19:19:34] *** /refresh, /me <msg>, /clear [lines to keep], /slots #, /dslots #, /search <string>, /f <string>, /dc++, /away <msg>, /back, /g <searchstring>, /imdb <imdbquery>, /u <url>, /rebuild, /download, /upload, /join <hub-ip>, /showjoins, /favshowjoins, /close, /userlist, /conn[ection], /fav[orite], /removefav[orite], /info, /pm <user> [message], /getlist <user>, /ignore <user>, /unignore <user>, /log <status, system, downloads, uploads>, /raw <raw-command>, /topic

After reaching a certain amount of commands, you won't be able to find what you're looking for. I suggest to change the output to the "one command per line with a descriptive text" format. Plugins could also benefit from that: if you make possible for plugins to register and unregister commands to the /help the same time (thus providing the consistent formatting which would depend on DC++ not the plugin itself!) plugins would also benefit from this.

[Fredrik Ullner (ullner)]

Adds a descriptive text to each /help-command and splits them up on multiple lines. Using "/help brief" will yield the old behaviour.

Note that it does not add support for plugins: this would need to be extended upon later if need be.

[poy (poy)]

this is great but the descriptions should be translatable.

1) make them translatable by using tstring(T_("text")) instead of _T("text") or with str(TF_("text %1% %2%") % param1 % param2) if parameters are needed. new lines should be kept out of translations.

2) either re-use the texts in the help/chat_commands.html file or modify it accordingly so that translators only have to translate once.

[Fredrik Ullner (ullner)]

Will now use T_ so the texts are translatable. Copied the texts from the help, so they should be (displaywise) the same.

[poy (poy)]

there is still a _T in the brief code paths, otherwise it's perfect. feel free to commit.

[poy (poy)]

Fixed in DC++ 0.830.