feat: release notes for 0.1.9; NetSurf license notices; bump version to 0.2.0

Cut two 0.1.9 x86_64 images: montauk-0.1.9-x86_64.iso (29 MB) and
montauk-0.1.9-sdk-x86_64.iso (194 MB). Both include the NetSurf port and
exclude the WIP git port; only the SDK image carries 0:/sdk.

GNUmakefile: add RELEASE_WITHOUT_SDK=1 to the release target, mirroring
RELEASE_WITH_PORTS. Needed because devkit is .PHONY and repopulates
programs/bin/sdk on every build, so the SDK cannot be held out by hand.
sdk/tcc and sdk/lua stay (installed by their own targets), as does 0:/tmp,
which the libc uses for tmpnam() and not just compiler intermediates.

Also strip .release-tmp/boot/kernel. The ramdisk carries its own copy of
the kernel -- the image the Installer lays down on the target disk -- and
it is not named *.elf, so the existing find missed it. It was shipping
unstripped at 6.2 MB against 0.7 MB.

Licensing: NetSurf (GPLv2, MIT artwork), the ten NetSurf project libraries
(MIT), utf8proc (MIT) and zlib now ship in both images and had no
attribution anywhere. Add notices for each, and broaden the stb_image
section to cover stb_truetype, which the GUI apps have always linked. The
component lists in license.txt and license.html were stale to match;
license.txt is the source for 0:/os/licenses/LICENSE.txt, so it ships.

downloads.html: 0.1.9 card with separate download links for the plain and
SDK images; 0.1.8 moves to the archive.

Co-Authored-By: Claude Opus 5 <[email protected]>

montaukos.org/downloads.html

@@ -119,6 +119,7 @@
 <hr>
 <ul>
 <li><a href="#latest">Latest Release</a></li>
+<li><a href="#v019">v0.1.9</a></li>
 <li><a href="#v018">v0.1.8</a></li>
 <li><a href="#v017">v0.1.7</a></li>
 <li><a href="#v016">v0.1.6</a></li>
@@ -139,6 +140,89 @@
 <hr>
 
 <h2 id="latest">Latest Release</h2>
+<div class="box release-card" id="v019">
+<h3>MontaukOS 0.1.9</h3>
+<p class="release-meta">August 13, 2026</p>
+<p>It is recommended that users run MontaukOS in a virtual machine rather than on real hardware.</p>
+<h4>Links</h4>
+<ul>
+<li><a href="downloads/montauk-0.1.9-x86_64.iso">Download ISO</a> (29 MB) - recommended</li>
+<li><a href="downloads/montauk-0.1.9-sdk-x86_64.iso">Download ISO with Montauk SDK</a> (194 MB) - includes gcc/g++/binutils toolchain</li>
+<li><a href="license.html">License</a></li>
+<li><a href="docs/usersmanual/index.html">Tutorials</a></li>
+<li><a href="docs/man/index.html">Manual pages</a></li>
+</ul>
+<blockquote>
+    For questions or comments, please mail to [email protected].
+</blockquote>
+<h4>New</h4>
+<ul>
+<li>Intel Wi-Fi (AX210/AX211) support</li>
+<li>Wi-Fi support in the desktop panel and the Network settings app</li>
+<li><code>wifi</code> command-line tool</li>
+<li>NetSurf web browser ported as a native MontaukOS app</li>
+<li>SSH server (<code>sshd</code>) with an SSH Server app for managing it</li>
+<li>NTP client (configured via <code>0:/config/ntp.toml</code> and Time applet)</li>
+<li><code>init</code> now discovers services from <code>0:/config/init.toml</code> rather than a hardcoded sequence</li>
+<li>New Display app for managing monitors, modes, and layout</li>
+<li>Expanded Intel GPU display management in the kernel</li>
+<li>Audio stack now mixes concurrent streams and switches output devices live</li>
+<li>New audio device switching UI in Audio app and the desktop panel</li>
+<li>Filesystems can be mounted and unmounted at runtime</li>
+<li>File metadata across all filesystems, exposed through a new <code>stat</code> syscall</li>
+<li>ext2 now saves timestamps and supports <code>utime</code></li>
+<li>New <code>mkdir</code>, <code>rmdir</code>, and <code>memtest</code> commands</li>
+<li>Expanded support in the PDF Viewer app</li>
+<li>Files shows modified dates in the Properties dialog</li>
+<li>Desktop UI consistency improvements</li>
+<li>Crash reports now capture a stack snapshot</li>
+<li>Userspace heap and virtual memory overhauled</li>
+<li><code>pread</code>, <code>pwrite</code>, <code>strndup</code>, <code>scandir</code>, <code>alphasort</code>, <code>usleep</code>, <code>ftruncate</code>, <code>M_PI</code>, and a non-blocking stdin readiness probe added to libc</li>
+<li>DOOM moved out of the OS tree into the mtkports project</li>
+</ul>
+<h4>Fixed</h4>
+<ul>
+<li>Numerous kernel concurrency, interrupt-context, and user virtual-address fixes</li>
+<li>Hardened the TCP/IP stack and unified the HTTP clients; fixed several networking bugs and regressions</li>
+<li>Improved Bluetooth reliability</li>
+<li>Corrected Intel GGTT setup and DP AUX EDID reads</li>
+<li>IPC handle slots are no longer reused while an object is still being torn down</li>
+<li>The ramdisk no longer packs symlinks as zero-byte files</li>
+<li>Fixed a ramdisk readdir inconsistency</li>
+<li>Processes now inherit their parent's environment</li>
+<li><code>getcwd</code> reports a truncated buffer as <code>ERANGE</code> instead of silently truncating</li>
+<li>Improved stdio and argument handling</li>
+<li>Clarified Intel iwlwifi firmware licensing</li>
+</ul>
+<h4>Known issues</h4>
+<ul>
+    <li>Intel GPU may struggle to wake up from S3 sleep, causing a black screen requiring a reset. S3 sleep is highly experimental and users are discouraged from relying on it.</li>
+    <li>Due to licensing restrictions, the proprietary DOOM WAD cannot be shipped; the DOOM engine warns at launch when no compatible WAD file is present, and game content is unavailable until the user supplies one.</li>
+</ul>
+<h4>Included in ISO</h4>
+<p>Two x86_64 images are published for this release. <code>montauk-0.1.9-sdk-x86_64.iso</code> additionally carries the Montauk SDK (gcc, binutils, etc.)</p>
+<ul>
+<li>MontaukOS SMP kernel</li>
+<li>Userspace bootstrap (<code>0:/os/init.elf</code>) and other essential system utilities</li>
+<li>MontaukOS desktop environment and graphical apps</li>
+<li>NetSurf web browser (<code>0:/apps/netsurf</code>)</li>
+<li>Manual pages (<code>0:/man</code>), readable via <code>man</code> command</li>
+<li>Service and system configuration (<code>0:/config</code>: init.toml, ssh.toml, ntp.toml, timezonedata.toml)</li>
+<li>System CA certificates (<code>0:/os/certs/ca-certificates.crt</code>)</li>
+<li>Intel Bluetooth controller and Wi-Fi (iwlwifi) firmware (<code>0:/os/firmware/intel</code>)</li>
+<li>Third-party license texts and notices (<code>0:/os/licenses</code>)</li>
+<li>Tiny C Compiler (<code>tcc</code>) with MontaukOS headers and libraries (<code>0:/sdk/tcc</code>)</li>
+<li>Lua 5.4 interpreter (<code>lua</code>) with headers and static library (<code>0:/sdk/lua</code>)</li>
+<li>Montauk SDK - native GCC/G++ and binutils (<code>0:/sdk</code>) - SDK image only</li>
+<li>Flat Remix icon pack</li>
+<li>JetBrains Mono, Noto Serif, Roboto, and C059 Roman (open Century Schoolbook) TrueType fonts</li>
+<li>DOOM engine with SDL_mixer audio support (game data not included)</li>
+<li>Experimental HTTP server (<code>httpd</code>) and default page (<code>0:/www/index.html</code>)</li>
+<li>Default wallpaper - blossoms by Nikhil Kumar, Unsplash (<code>0:/os/wallpapers</code>)</li>
+</ul>
+</div>
+
+<h2>Release Archive</h2>
 <div class="box release-card" id="v018">
 <h3>MontaukOS 0.1.8</h3>
 <p class="release-meta">July 18, 2026</p>
@@ -197,7 +281,6 @@
 </ul>
 </div>
 
-<h2>Release Archive</h2>
 <div class="box release-card" id="v017">
 <h3>MontaukOS 0.1.7</h3>
 <p class="release-meta">July 9, 2026</p>