Fix GH-1402: PHP 8.* ZTS wrong compilation flag for Linux

Author: cmb69

appendices/configure/php.xml

@@ -47,6 +47,18 @@
      </para>
     </listitem>
    </varlistentry>
+   <varlistentry xml:id="configure.enable-zts">
+    <term>
+     <option role="configure">--enable-zts</option>
+    </term>
+    <listitem>
+     <para>
+      Enables thread safety.
+      Prior to PHP 8.0.0 on non-Windows systems, the option was called
+      <option role="configure">--enable-maintainer-zts</option>.
+     </para>
+    </listitem>
+   </varlistentry>
   </variablelist>
  </sect3>
 

reference/parallel/setup.xml

@@ -7,7 +7,9 @@
  <simplesect xml:id="parallel.requirements">
   &reftitle.required;
   <para>
- parallel requires a build of PHP with ZTS (Zend Thread Safety) enabled ( --enable-maintainer-zts or --enable-zts on Windows )
+ parallel requires a build of PHP with ZTS (Zend Thread Safety) enabled
+ (<option role="configure">--enable-zts</option>, or on non-Windows systems prior to PHP 8.0.0,
+ <option role="configure">--enable-maintainer-zts</option>)
   </para>
   <caution>
   <para>

reference/pht/configure.xml

@@ -5,7 +5,9 @@
  &reftitle.install;
 
  <para>
-  PHP needs to be built with ZTS (Zend Thread Safety) mode enabled. If PHP is being built from source, then the <option role="configure">--enable-maintainer-zts</option> configuration option (--enable-zts on Windows) must be used.
+  PHP needs to be built with ZTS (Zend Thread Safety) mode enabled. If PHP is being built from source,
+  then the <option role="configure">--enable-zts</option> (or on non-Windows systems prior to PHP 8.0.0,
+  <option role="configure">--enable-maintainer-zts</option>) configuration option must be used.
  </para>
 
  <para>

reference/pthreads/setup.xml

@@ -7,7 +7,9 @@
  <section xml:id="pthreads.requirements">
   &reftitle.required;
   <para>
- pthreads requires a build of PHP with ZTS (Zend Thread Safety) enabled ( --enable-maintainer-zts or --enable-zts on Windows )
+ pthreads requires a build of PHP with ZTS (Zend Thread Safety) enabled
+ (<option role="configure">--enable-zts</option>, or on non-Windows systems prior to PHP 8.0.0,
+ <option role="configure">--enable-maintainer-zts</option>)
   </para>
   <caution>
   <para>