Manual: mention the FreeBSD port

Closes: #1824
(cherry picked from commit 949db8ec)

doc/manual/source/installation-and-configuration.rst

@@ -8,9 +8,9 @@ Software requirements
 =====================
 
 Packaged versions of Dynare are available for Windows (8.1, 10 and 11), several
-GNU/Linux distributions (Debian, Ubuntu, Linux Mint, Arch Linux) and macOS (12
-“Monterey”). Dynare should work on other systems, but some compilation steps
-are necessary in that case.
+GNU/Linux distributions (Debian, Ubuntu, Linux Mint, Arch Linux), macOS (12
+“Monterey”), and FreeBSD. Dynare should work on other systems, but some
+compilation steps are necessary in that case.
 
 In order to run Dynare, you need one of the following:
 
@@ -135,6 +135,13 @@ once)::
 
   octave:1> pkg install -forge io statistics control struct optim
 
+On FreeBSD
+----------
+
+A `FreeBSD port for Dynare <https://www.freshports.org/science/dynare/>`__ is
+available. It can be installed with::
+
+  pkg install dynare
 
 For other systems
 -----------------