tac_plus: New package (TACACS+ daemon)

Signed-off-by: Bruno Pena <brunompena@gmail.com>

tac_plus: Updated to the latest commit from upstream. Updated URL to reference Facebook's GitHub repository. Tweaked Makefile to include the date on the source package filename.

Signed-off-by: Bruno Pena <brunompena@gmail.com>

net/tac_plus/files/tac_plus.conf

@@ -0,0 +1,58 @@
+#
+# An example tac_plus configuration. You should change this
+# before using it.
+#
+
+# Define where to log accounting data, this is the default.
+accounting file = /var/log/tac_plus.acct
+
+# This is the key that clients have to use to access Tacacs+
+key = testing123
+
+# Use /etc/passwd file to do authentication
+#default authentication = file /etc/passwd
+
+# You can use feature like per host key with different enable passwords
+#host = 127.0.0.1 {
+#        key = test 
+#        type = cisco
+#        enable = <des|cleartext> enablepass
+#        prompt = "Welcome XXX ISP Access Router \n\nUsername:"
+#}
+
+# We also can define local users and specify a file where data is stored.
+# That file may be filled using tac_pwd
+#user = test1 {
+#    name = "Test User"
+#    member = staff
+#    login = file /etc/tacacs/tacacs_passwords
+#}
+
+# We can also specify rules valid per group of users.
+#group = group1 {
+#	cmd = conf {
+#		deny
+#	}
+#}
+
+# Another example : forbid configure command for some hosts
+# for a define range of clients
+#group = group1 {
+#	login = file /etc/passwd
+#	service = ppp
+#	protocol = ip {
+#		addr = 10.10.0.0/24
+#	}
+#	cmd = conf {
+#		deny .*
+#	}
+#}
+
+user = DEFAULT {
+	login = file /etc/passwd
+	service = ppp protocol = ip {}
+}
+
+# Much more features are availables, like ACL, more service compatibilities,
+# commands authorization, scripting authorization.
+# See the man page for those features.