README.md: Improve the structure of the file

Break the file into more sections and make use of more of Markdown's
formatting features for better readability.

Signed-off-by: Tyler Hicks <tyhicks@linux.microsoft.com>

README.md

@@ -1,25 +1,46 @@
-= Introduction =
+# Introduction
 
-The WSL 2 Linux kernel repo provides the additional infrastructure necessary
-to build and release the kernel component of WSL 2. It was never designed to
-replace the current existing community and feedback channels for WSL,
-especially through: https://github.com/microsoft/WSL. This is why we are not
-accepting issues or pull requests through this repository.
+The [WSL2-Linux-Kernel][wsl2-kernel] repo contains the kernel source code and
+configuration files for the [WSL2][about-wsl2] kernel.
 
-If you have an issue relating to WSL, or the WSL 2 Linux kernel configuration,
-please report it at the WSL GitHub: would like contribute to or report an issue
-on the WSL2 kernel, please do so at the WSL GitHub:
+# Reporting Bugs
 
-https://github.com/microsoft/WSL/issues/new/choose
+If you discover an issue relating to WSL or the WSL2 kernel, please report it on
+the [WSL GitHub project][wsl-issue]. It is not possible to report issues on the
+[WSL2-Linux-Kernel][wsl2-kernel] project.
 
-The WSL 2 Linux kernel is based on the Linux version from
-https://www.kernel.org/. If you would like to contribute to or report an issue
-on the Linux kernel in general, please do so on the upstream Linux GitHub:
+If you're able to determine that the bug is present in the upstream Linux
+kernel, you may want to work directly with the upstream developers. Please note
+that there are separate processes for reporting a [normal bug][normal-bug] and
+a [security bug][security-bug].
 
-https://www.kernel.org/doc/html/latest/process/submitting-patches.html
+# Feature Requests
 
-= Build Instructions =
+Is there a missing feature that you'd like to see? Please request it on the
+[WSL GitHub project][wsl-issue].
 
-1. Install a recent Ubuntu distribution
-2. sudo apt install build-essential flex bison libssl-dev libelf-dev
-3. make KCONFIG_CONFIG=Microsoft/config-wsl
+If you're able and interested in contributing kernel code for your feature
+request, we encourage you to [submit the change upstream][submit-patch].
+
+# Build Instructions
+
+Instructions for building an x86_64 WSL2 kernel with an Ubuntu distribution are
+as follows:
+
+1. Install the build dependencies:  
+   `$ sudo apt install build-essential flex bison libssl-dev libelf-dev`
+2. Build the kernel using the WSL2 kernel configuration:  
+   `$ make KCONFIG_CONFIG=Microsoft/config-wsl`
+
+# Install Instructions
+
+Please see the documentation on the [.wslconfig configuration
+file][install-inst] for information on using a custom built kernel.
+
+[wsl2-kernel]:  https://github.com/microsoft/WSL2-Linux-Kernel
+[about-wsl2]:   https://docs.microsoft.com/en-us/windows/wsl/about#what-is-wsl-2
+[wsl-issue]:    https://github.com/microsoft/WSL/issues/new/choose
+[normal-bug]:   https://www.kernel.org/doc/html/latest/admin-guide/bug-hunting.html#reporting-the-bug
+[security-bug]: https://www.kernel.org/doc/html/latest/admin-guide/security-bugs.html
+[submit-patch]: https://www.kernel.org/doc/html/latest/process/submitting-patches.html
+[install-inst]: https://docs.microsoft.com/en-us/windows/wsl/wsl-config#configure-global-options-with-wslconfig