doc: improve lxc-unshare(1)

doc/ja/lxc-unshare.sgml.in

@@ -106,13 +106,17 @@ by KATOH Yasufumi <karma at jazz.email.ne.jp>
 	    <replaceable>NETWORK</replaceable>. This allows one to change
 	    the context of the process to e.g. the network namespace of the
 	    container while retaining the other namespaces as those of the
-	    host.
+            host. (The pipe symbol needs to be escaped, e.g.
+            <replaceable>MOUNT\|PID</replaceable> or quoted, e.g.
+            <replaceable>"MOUNT|PID"</replaceable>.)
             -->
             アタッチする名前空間を、パイプでつなげたリストで指定します。
             例えば <replaceable>NETWORK|IPC</replaceable> のようにです。
             指定できる値は <replaceable>MOUNT</replaceable>、<replaceable>PID</replaceable>、<replaceable>UTSNAME</replaceable>、<replaceable>IPC</replaceable>、<replaceable>USER </replaceable>、<replaceable>NETWORK</replaceable> です。
             これにより、プロセスのコンテキストを変更することができます。
             例えば、コンテナのネットワーク名前空間だけを変更し、他の名前空間をホストのものと同じものに保ったままにするというようなことです。
+            (パイプ記号を <replaceable>MOUNT\|PID</replaceable> のようにエスケー
+プするか、<replaceable>"MOUNT|PID"</replaceable> のように引用符号を付ける必要が>あります。)
 	  </para>
 	</listitem>
       </varlistentry>

doc/ko/lxc-unshare.sgml.in

@@ -106,10 +106,13 @@ by Sungbae Yoo <sungbae.yoo at samsung.com>
 	    <replaceable>NETWORK</replaceable>. This allows one to change
 	    the context of the process to e.g. the network namespace of the
 	    container while retaining the other namespaces as those of the
-	    host.
+            host. (The pipe symbol needs to be escaped, e.g.
+            <replaceable>MOUNT\|PID</replaceable> or quoted, e.g.
+            <replaceable>"MOUNT|PID"</replaceable>.)
             -->
             붙일 네임스페이스를 지정한다.
             <replaceable>NETWORK|IPC</replaceable>와 같이 파이프(|)로 구분된 리스트를 사용할 수 있다. 허용되는 값은 <replaceable>MOUNT</replaceable>, <replaceable>PID</replaceable>, <replaceable>UTSNAME</replaceable>, <replaceable>IPC</replaceable>, <replaceable>USER </replaceable>, <replaceable>NETWORK</replaceable>이다. 이를 사용하여, 컨테이너의 네트워크 네임스페이스를 사용하면서도 다른 네임스페이스는 호스트의 것을 그대로 사용하는 등의 조작이 가능하다.
+            (파이프 기호는 <replaceable>MOUNT\|PID</replaceable>처럼 \로 처리를 해주거나, <replaceable>"MOUNT|PID"</replaceable>처럼 따옴표를 붙여야 한다.)
 	  </para>
 	</listitem>
       </varlistentry>

doc/lxc-unshare.sgml.in

@@ -93,7 +93,9 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 	    <replaceable>NETWORK</replaceable>. This allows one to change
 	    the context of the process to e.g. the network namespace of the
 	    container while retaining the other namespaces as those of the
-	    host.
+	    host. (The pipe symbol needs to be escaped, e.g.
+            <replaceable>MOUNT\|PID</replaceable> or quoted, e.g.
+            <replaceable>"MOUNT|PID"</replaceable>.)
 	  </para>
 	</listitem>
       </varlistentry>