README: pkg, and URLs

Primarily: add one of the pkg methods from <https://www.freshports.org/security/py-pyotp2289>. 

Whilst here: update the URL for the One-time Passwords section of the FreeBSD Handbook, and refine the URL for the manual page.

1 files changed, 8 insertions, 7 deletions

diff --git a/README.md b/README.md
index 64cd385..ecf8a22 100644
--- a/README.md
+++ b/README.md
@@ -5,12 +5,11 @@ RFC-2289.
 
 It requires no additional libraries.
 
-
 ## General
 
 The main reason for writing this library was the need to login into my
-FreeBSD servers using the [opiepasswd](https://www.freebsd.org/cgi/man.cgi?query=opiepasswd&sektion=1&manpath=freebsd-release-ports)
-as described in [FreeBSD Handbook](https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/one-time-passwords.html).
+FreeBSD servers using [opiepasswd(1)](https://www.freebsd.org/cgi/man.cgi?query=opiepasswd&sektion=1&manpath=FreeBSD)
+as [described in the FreeBSD Handbook](https://docs.freebsd.org/en/books/handbook/security/#one-time-passwords).
 
 I decided to license the library under the
 [Simplified BSD License / 2-clause BSD license](https://github.com/blackm0re/pyotp2289/blob/master/LICENSE) and not under the
@@ -18,7 +17,6 @@ I decided to license the library under the
 
 I hope that somebody will find it useful.
 
-
 ## Installation
 
 ### pip (pypi)
@@ -27,17 +25,21 @@ I hope that somebody will find it useful.
    pip install pyotp2289
    ```
 
-
 ### FreeBSD
 
 *pyotp2289* is included in the official ports-tree.
 
    ```bash
+   pkg install security/py-pyotp2289
+   ```
+
+– or: 
+
+   ```bash
    cd /usr/ports/security/py-pyotp2289
    make install clean
    ```
 
-
 ### Gentoo
 
    ```bash
@@ -50,7 +52,6 @@ I hope that somebody will find it useful.
    emerge dev-python/pyotp2289
    ```
 
-
 ## Overview of RFC-2289
 
 RFC-2289 describes a one-time password authentication system (OTP):