build: align minimum build dependencies with ndn-cxx

 * boost 1.65.1
 * gcc 7.4
 * clang 6.0
 * Xcode 10.0 (11.3 or later recommended)

Change-Id: I5e41f2a70d6c510dcb889a083a51504121b4627d
diff --git a/docs/INSTALL.rst b/docs/INSTALL.rst
index 231d8ae..a73b211 100644
--- a/docs/INSTALL.rst
+++ b/docs/INSTALL.rst
@@ -22,6 +22,7 @@
 -  Fedora >= 29
 -  Gentoo Linux
 -  Raspberry Pi OS (formerly Raspbian) >= 2019-06-20
+-  FreeBSD >= 12.0
 -  macOS 10.14
 
 .. _Install NFD on Ubuntu Linux using the NDN PPA repository:
diff --git a/docs/conf.py b/docs/conf.py
index 92bf794..e661298 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -18,7 +18,7 @@
 # -- Project information -----------------------------------------------------
 
 project = u'Named Data Networking Forwarding Daemon (NFD)'
-copyright = u'Copyright © 2014-2021 Named Data Networking Project.'
+copyright = u'Copyright © 2014-2022 Named Data Networking Project.'
 author = u'Named Data Networking Project'
 
 # The short X.Y version.