run0: add --no-pager

Since run0 --help now goes through the pager, provide a way to turn that
off from the command line, like all other commands that page --help. The
option is documented the same way as for systemd-run.

man/run0.xml

@@ -373,6 +373,16 @@
       <xi:include href="standard-options.xml" xpointer="no-ask-password" />
       <xi:include href="standard-options.xml" xpointer="help" />
       <xi:include href="standard-options.xml" xpointer="version" />
+
+      <varlistentry id='no-pager'>
+        <term><option>--no-pager</option></term>
+
+        <listitem><para>Do not pipe output into a pager. This currently only applies to
+        <option>--help</option>. (The pager is not started during normal operation.)</para>
+
+        <xi:include href="version-info.xml" xpointer="v262"/>
+        </listitem>
+      </varlistentry>
     </variablelist>
 
     <para>All command line arguments after the first non-option argument become part of the command line of

src/run/run.c

@@ -797,6 +797,10 @@ static int parse_argv_sudo_mode(int argc, char *argv[]) {
                         arg_ask_password = false;
                         break;
 
+                OPTION_COMMON_NO_PAGER:
+                        arg_pager_flags |= PAGER_DISABLE;
+                        break;
+
                 OPTION_LONG("machine", "CONTAINER", "Operate on local container"):
                         r = parse_machine_argument(opts.arg, &arg_host, &arg_transport);
                         if (r < 0)