Build: convert rt.proto file from UTF8 to ASCII (#12422)

* Docs: remove IRC.How-To doc

* Build: convert rt.proto from UTF8 to ASCII to pass proto_build_generator.py

docs/howto/how_to_use_IRC_client_on_ubuntu.md

-# How to use IRC client on Ubuntu
-
-## Introduction
-
-Internet Relay Chat (IRC) is a form of real-time Internet chat. It is mainly designed for group (many-to-many) communication in discussion forums called channels, but also allows one-to-one communication via private message.[[Reference 1](https://help.ubuntu.com/community/InternetRelayChat)]
-
-There are many IRC clients, like [Quassel](https://quassel-irc.org/), [Hexchat](https://hexchat.github.io/), XChat, Konversation(KDE), and console based irssi, WeeChat, etc.
-
-In this guide, we will take **Hexchat** for an example to demonstrate.
-Hexchat is free and open source, available for both Linux, Mac OS X and Windows.
-
-## Installation
-
-Installing hexchat is simple, just open up a terminal and run the following command:
-```
-sudo apt-get install hexchat
-```
-(Tested on Ubuntu 14.04, but it won't be much different from 16.04.)
-
-Once installed, start HexChat from Unity Dash or application menu.
-
-![img](images/irc_image_01.png)
-
-## How to use Hexchat
-
-Upon your first launch, you will be asked to choose your nickname and a network server. IRC network is a network of IRC servers that are connected to each other. [Freenode](https://freenode.net) is currently the largest IRC network and is also used by most open source projects.[[Reference 2](https://www.linuxbabe.com/ubuntu/install-use-hexchat-ubuntu-16-04)]
-
-Enter you favourite nickname(it can be changed laterly by command `nick`, you will see later), and choose freenode IRC server from server list.
-
-Then click `Connect` button.
-
-![img](images/irc_image_02.png)
-
-Note, if freenode isn't in the list, just click `Add` button to add one with a server name(here we can use "Freenode"), then click `Edit` button to add server address and port `chat.freenode.net/+6697`, which the `+` means to signify SSL. The port is entirely optional, if no port is given the default port used is 6667 and 6697 for SSL.[[Reference 3](https://hexchat.readthedocs.io/en/latest/settings.html#servers)] Close the `Edit dialog` and go back to `Server list`.
-
-![img](images/irc_image_03.png)
-
-It will take a few seconds to connect to the selected IRC server.
-Once connected, you can choose to join a channel, or join later with `join` command. Here we enter #apolloauto channel to join.
-
-![img](images/irc_image_04.png)
-
-Then click `Ok` button, it will join #apolloauto channel.
-
-![img](images/irc_image_05.png)
-
-Wow! Now you can say hello to the channel members :)
-
-## Most used command
-To join a channel, just type join command(IRC command prefixed with `/`)  with channel name(IRC channel name prefixed with `#`)
-```
-/join #channel_name
-```
-To change a new nickname,
-```
-/nick new_nickname
-```
-To see all commands,
-```
-/help
-```
-To start one-to-one private chat,
-```
-/query the_nickname_talking_to
-```
-
-There are a `NickServ` and a `ChanServ` that you can register you nickname or maitain control of a channel.
-To see what you can do,
-```
-/msg NickServ help
-```
-and
-```
-/msg ChanServ help
-```
-
-## Further reading
-[Basic IRC Commands](http://www.ircbeginner.com/ircinfo/ircc-commands.html)
-
-[Tips and Tricks](http://www.ircbeginner.com/ircinfo/ircc-tips.html)
-

modules/perception/proto/rt.proto

@@ -711,7 +711,7 @@ message ConvolutionParameter {
   repeated uint32 stride = 6;       // The stride; defaults to 1
   // Factor used to dilate the kernel, (implicitly) zero-filling the resulting
   // holes. (Kernel dilation is sometimes referred to by its use in the
-  // algorithme à trous from Holschneider et al. 1987.)
+  // algorithme a trous from Holschneider et al. 1987.)
   repeated uint32 dilation = 18;  // The dilation; defaults to 1
 
   // For 2D convolution only, the *_h and *_w versions may also be used to