package.yml: Add devel key description

Author: davidjharder

docs/packaging/package.yml.md

@@ -87,11 +87,12 @@ Not all fields in `package.yml` are mandatory, but a small selection are. Below
 
 | Key Name        | Type        | Description                                                                                                                                                                                                                                                                           |
 | --------------- | ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| **clang**       | `bool`      | Set to `true` if this package benefits from being built with Clang.                                                                                                                                                                                                                    |
-| **extract**     | `bool`      | Set to `false` to disable automatic source extraction.                                                                                                                                                                                                                                   |
-| **autodep**     | `bool`      | Set to `false` to disable automatic binary dependency resolution at build time.                                                                                                                                                                                                          |
-| **emul32**      | `bool`      | Set to `true` to enable an `-m32` build (32-bit libs).                                                                                                                                                                                                                                 |
-| **libsplit**    | `bool`      | Set to `false` to disable splitting of libraries into `devel` sub-packages.                                                                                                                                                                                                              |
+| **clang**       | `bool`      | Set to `true` if this package benefits from being built with Clang.                                                                                                                                                                                                                   |
+| **extract**     | `bool`      | Set to `false` to disable automatic source extraction.                                                                                                                                                                                                                                |
+| **autodep**     | `bool`      | Set to `false` to disable automatic binary dependency resolution at build time.                                                                                                                                                                                                       |
+| **emul32**      | `bool`      | Set to `true` to enable an `-m32` build (32-bit libs).                                                                                                                                                                                                                                |
+| **libsplit**    | `bool`      | Set to `false` to disable splitting of libraries into `devel` sub-packages.                                                                                                                                                                                                           |
+| **devel**       | `bool`      | Set to `true` to place the `-devel` sub-package into the `system.devel` component                                                                                                                                                                                                     |
 | **conflicts**   | `string(s)` | Specify packages that cannot be installed together with this one.                                                                                                                                                                                                                     |
 | **optimize**    | `list`      | Specify preset keys to modify compiler and linker flags during build. You can learn more [here](/docs/packaging/package.yml#optimize-values).                                                                                                                                         |
 | **builddeps**   | `list`      | Specify build dependencies for the package. You can learn more [here](/docs/packaging/packaging-practices#build-dependencies).                                                                                                                                                        |
@@ -100,7 +101,7 @@ Not all fields in `package.yml` are mandatory, but a small selection are. Below
 | **replaces**    | `dict(s)`   | Replace one package with another, used when renaming or deprecating packages for clean upgrade paths.                                                                                                                                                                                 |
 | **patterns**    | `dict(s)`   | Allows fine grained control over file placement within the package or sub-packages. Useful for packages that are development only (i.e. `/usr/bin` files). You can learn more [here](/docs/packaging/packaging-practices#patterns).                                                   |
 | **environment** | `unicode`   | Specify code that will be exported to all packaging steps of the build (i.e. exporting variables for the entire build).                                                                                                                                                               |
-| **networking**  | `bool`      | Set to `true` to enable networking within solbuild.                                                                                                                                                                                                                                    |
+| **networking**  | `bool`      | Set to `true` to enable networking within solbuild.                                                                                                                                                                                                                                   |
 
 ### Packaging step keys, optional