sntp: add page (#11877)

* sntp: add page

---------

Co-authored-by: Vitor Henrique <87824454+vitorhcl@users.noreply.github.com>
Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>

pages/osx/sntp.md

@@ -0,0 +1,16 @@
+# sntp
+
+> A very Simple Network Time Protocol client program.
+> More information: <https://keith.github.io/xcode-man-pages/sntp.1>.
+
+- Query a specified SNTP server and display the time:
+
+`sntp {{pool.ntp.org}}`
+
+- Synchronize the system clock with a specified SNTP server:
+
+`sudo sntp -S {{pool.ntp.org}}`
+
+- Enable debug logging:
+
+`sntp -d {{pool.ntp.org}}`