regen
diff --git a/man/libzip.html b/man/libzip.html
index 3c2e3b8..bda1461 100644
--- a/man/libzip.html
+++ b/man/libzip.html
@@ -75,6 +75,18 @@
original zip archive atomically.</p>
<p class="Pp">Below there are two sections listing functions: one for how to
read from zip archives and one for how to create/modify them.</p>
+<section class="Ss">
+<h2 class="Ss" id="THREAD_SAFETY"><a class="permalink" href="#THREAD_SAFETY">THREAD
+ SAFETY</a></h2>
+In general, different zip archives opened by <code class="Nm">libzip</code> are
+ independent of each other and can be used by parallel-running threads without
+ locking. If you want to use an archive from multiple threads, you have to
+ synchronize access to it yourself. If you use an archive as a source for
+ <a class="Xr" href="zip_file_add.html">zip_file_add(3)</a> or
+ <a class="Xr" href="zip_file_replace.html">zip_file_replace(3)</a>, access to
+ the target archive must be synchronized with access to the source archive as
+ well.
+</section>
</section>
<section class="Sh">
<h1 class="Sh" id="READING_ZIP_ARCHIVES"><a class="permalink" href="#READING_ZIP_ARCHIVES">READING
@@ -245,7 +257,7 @@
</div>
<table class="foot">
<tr>
- <td class="foot-date">July 23, 2020</td>
+ <td class="foot-date">September 15, 2020</td>
<td class="foot-os">NiH</td>
</tr>
</table>
diff --git a/man/libzip.man b/man/libzip.man
index 5f8b19c..aa12a9d 100644
--- a/man/libzip.man
+++ b/man/libzip.man
@@ -30,7 +30,7 @@
.\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
.\" IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
-.TH "LIBZIP" "3" "July 23, 2020" "NiH" "Library Functions Manual"
+.TH "LIBZIP" "3" "September 15, 2020" "NiH" "Library Functions Manual"
.nh
.if n .ad l
.SH "NAME"
@@ -66,6 +66,19 @@
.PP
Below there are two sections listing functions: one for how to read
from zip archives and one for how to create/modify them.
+.SS "THREAD SAFETY"
+In general, different zip archives opened by
+\fBlibzip\fR
+are independent of each other and can be used by parallel-running
+threads without locking.
+If you want to use an archive from multiple threads, you have to
+synchronize access to it yourself.
+If you use an archive as a source for
+zip_file_add(3)
+or
+zip_file_replace(3),
+access to the target archive must be synchronized with access to the
+source archive as well.
.SH "READING ZIP ARCHIVES"
.SS "open archive"
.TP 4n
