Update to qtwebengine-5.15.10 using python3.

For the avoidance of doubt, the patch md5sum is
5436b52ab02f93340702b413930bf0ed

introduction/welcome/changelog.xml

@@ -44,6 +44,11 @@
     <listitem>
       <para>June 24th, 2022</para>
       <itemizedlist>
+        <listitem>
+          <para>[ken] - Update to qtwebengine-5.15.10 (security fix)
+          and patch it to use python3. Fixes
+          <ulink url="&blfs-ticket-root;16687">#16687</ulink>.</para>
+        </listitem>
         <listitem>
           <para>[pierre] - Update to OpenJDK-18.0.1.1. Fixes
           <ulink url="&blfs-ticket-root;16690">#16690</ulink>.</para>

packages.ent

@@ -795,7 +795,7 @@ to avoid building libxml2 twice, which is slow with all deps -->
 <!ENTITY pango-version                "&pango-minor;.7">
 <!ENTITY pangomm-version              "2.46.2">
 <!ENTITY qt5-version                  "5.15.5">
-<!ENTITY qtwebengine-version          "5.15.9">
+<!ENTITY qtwebengine-version          "5.15.10">
 <!ENTITY qtwebkit-version             "5.9.0">
 <!ENTITY qscintilla-version           "2.10.4">
 <!ENTITY shared-mime-info-version     "2.2">

x/lib/qtwebengine.xml

@@ -10,10 +10,10 @@
      URL for a prepared git version -->
   <!ENTITY qtwebengine-download-http "&sources-anduin-http;/qtwebengine/qtwebengine-&qtwebengine-version;.tar.xz">
   <!ENTITY qtwebengine-download-ftp  " ">
-  <!ENTITY qtwebengine-md5sum        "a3d64826a73996e5c1ba6ea8c5ef0490">
-  <!ENTITY qtwebengine-size          "306 MB">
-  <!ENTITY qtwebengine-buildsize     "5.1 GB (154 MB installed)">
-  <!ENTITY qtwebengine-time          "94 SBU (typical, Using parallelism=4)">
+  <!ENTITY qtwebengine-md5sum        "d963e40e47449d7a11f83d0249e7643a">
+  <!ENTITY qtwebengine-size          "307 MB">
+  <!ENTITY qtwebengine-buildsize     "5.1 GB (152 MB installed)">
+  <!ENTITY qtwebengine-time          "93 SBU (typical, Using parallelism=4)">
 ]>
 
 <sect1 id="qtwebengine" xreflabel="qtwebengine-&qtwebengine-version;">
@@ -251,8 +251,8 @@
     <para role="required">
       <xref linkend="nodejs"/>,
       <xref linkend="nss"/>,
-      <xref linkend="pciutils"/>,
-      <xref linkend="python2"/>, and
+      <xref linkend="pciutils"/>, and
+<!--  <xref linkend="python2"/>, and -->
       <xref linkend='qt5'/>
     </para>
 
@@ -296,7 +296,9 @@
   <sect2 role="installation">
     <title>Installation of qtwebengine</title>
 
-    <note>
+<!-- following merely commented instead of deleted, in case we need to
+      drop back when a future version of python3 is released -->
+<!--<note>
       <para>
         Unlike version 5.15.2, the chromium-derived build system now needs
         <command>python</command> to be available and to be python2. In
@@ -314,7 +316,7 @@
       user, create the python symlink:
     </para>
 
-<screen role="root"><userinput>ln -svf /usr/bin/python{2,}</userinput></screen>
+<screen role="root"><userinput>ln -svf /usr/bin/python{2,}</userinput></screen>-->
 
 
 <!--<para>
@@ -325,7 +327,8 @@
 <screen><userinput remap="pre">patch -Np1 -i ../qtwebengine-&qtwebengine-version;-5.15.7-1.patch</userinput></screen>-->
 
     <para>
-      Apply a patch to fix several issues that can prevent the build from working:
+      Apply a patch to fix several issues that can prevent the build from completing,
+      and to force it to use python3:
     </para>
 
 <screen><userinput remap="pre">patch -Np1 -i ../qtwebengine-&qtwebengine-version;-build_fixes-1.patch</userinput></screen>
@@ -392,12 +395,12 @@ et.seq, particularly 037002.html which shows the commit near the end. -->
   mv -v ${QT5DIR}/lib/libQt5WebEngineCore.so{,.old}
 fi</userinput></screen>-->
 
-    <para>
+<!--<para>
       The last fix is needed to build with gcc-12:
     </para>
 
 <screen><userinput>sed -e '/#include/i#include &lt;vector&gt;' \
-    -i src/3rdparty/chromium/third_party/skia/src/utils/SkParseColor.cpp</userinput></screen>
+    -i src/3rdparty/chromium/third_party/skia/src/utils/SkParseColor.cpp</userinput></screen>-->
 
     <para>
       Install <application>qtwebengine</application> by running the following
@@ -444,12 +447,12 @@ make</userinput></screen>
 <screen role="root"><userinput>find $QT5DIR/ -name \*.prl \
    -exec sed -i -e '/^QMAKE_PRL_BUILD_DIR/d' {} \;</userinput></screen>
 
-    <para>
+<!--<para>
       Finally, as the <systemitem class="username">root</systemitem>
       user, remove the python symlink:
     </para>
 
-<screen role="root"><userinput>rm -v /usr/bin/python</userinput></screen>
+<screen role="root"><userinput>rm -v /usr/bin/python</userinput></screen>-->
   </sect2>
 
   <sect2 role="commands">
@@ -506,7 +509,7 @@ make</userinput></screen>
             CPU-intensive tasks at the same time. For an editor on a machine
             with a lot of CPUs, trying to measure the build time for a 4-CPU
             machine, <option>NINJAJOBS=4 make</option> will give a reasonable
-            approximation (there is a short period where N+2 python2 and node
+            approximation (there is a short period where N+2 python and node
             jobs run).
           </para>
         </listitem>