Update .build.yml to publish via sourcehut pages

GPU -> CPU

improve phrasing, grammar, typos

Signed-off-by: Vlad-Stefan Harbuz <vlad@vladh.net>

Fixed a small typo that passed in an implementation where wl_interface was expected.

I scratched my head for a minute then double checked the Weston and
Chromium Exo implementations to make sure, but it looks like this should
be like this instead.

various: fix typos

Change - to —

Fix gcc arguments order for server

Same fix as 7280172f84186a2ed1290793f7ed46e1946745ab, but for the
server.

Fix gcc arguments order

The command to build the example failed with gcc, because
-lwayland-client was passed before client.c:

    $ clang -o client client.c -lwayland-client
    $ gcc   -o client client.c -lwayland-client
    $ clang -o client -lwayland-client client.c
    $ gcc   -o client -lwayland-client client.c
    /usr/bin/ld: /tmp/ccgg4wcL.o: in function `main':
    client.c:(.text+0x15): undefined reference to `wl_display_connect'
    /usr/bin/ld: client.c:(.text+0x73): undefined reference to `wl_display_disconnect'
    collect2: error: ld returned 1 exit status

Fix subsurface Z-order documentation

A subsurface is not restricted to being placed above the parent surface;
it may be placed above or below any sibling surface or the parent
surface itself.

Mostly compilation fixes for wayland-book section 9.5

Fix missing arguments in wl_keyboard_modifiers

Fix typo

Remove redundant prints in wl_pointer_frame

Add missing boolean fields for seat capabilities

wayland-book: move static keyword to please -Wold-style-declaration

Compiling the samples casues old-style-declaration warnings while
using the -Wextra arg. This patch moves the static keyword to the
beginning of lines, to fix this.

Fix two issues with the example code in ch. 9.5

Clarify unstable promotion

minor fixes and clarification in ch. 5.2

Fix Mesa name case

Update acknowledgements.md

Add COPYING

Update introduction.md

Complete seat example code

Update introduction.md