Add a template for WPA2-TTLS, which is notably used by Eduroam.

--- a/encryption/templates/active
+++ b/encryption/templates/active
@@ -4,6 +4,7 @@ wpa-psk
 wpa-psk-hex
 wpa2-leap
 wpa2-peap
+wpa2-ttls
 wep-hex
 wep-passphrase
 wep-shared
diff --git a/encryption/templates/wpa2-ttls b/encryption/templates/wpa2-ttls
new file mode 100644
index 0000000..4f66a1e
--- /dev/null
+++ b/encryption/templates/wpa2-ttls
@@ -0,0 +1,20 @@
+name = WPA2-TTLS (used notably by Eduroam)
+author = various contributors
+version = 1
+require identity *Identity anonymous_identity *Anonymous_identity password *Password ca_cert *Path_to_CA_Cert
+protected password *Password
+-----
+ctrl_interface=/var/run/wpa_supplicant
+network={
+        ssid="$_ESSID"
+        scan_ssid=$_SCAN
+        proto=WPA2
+        key_mgmt=WPA-EAP
+        group=CCMP TKIP
+        eap=TTLS
+        identity="$_IDENTITY"
+        password="$_PASSWORD"
+        anonymous_identity="$_ANONYMOUS_IDENTITY"
+        ca_cert="$_CA_CERT"
+        phase2="auth=PAP"
+}
s'><tr><td>
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<tr><td><span title='2022-03-16 15:48:52 +0100'>2022-03-16</span></td><td><a href='/guix/commit/gnu/packages/lean.scm?id=fee68a93d833b7774de6b0af9ddb9f5f696922eb'>gnu: Add python-mathlibtools.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/lean.scm (python-mathlibtools): New variable.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Pradana AUMARS</td></tr>
<tr><td><span title='2022-03-11 23:34:47 -0500'>2022-03-11</span></td><td><a href='/guix/commit/gnu/packages/lean.scm?id=46ae78ba45711b43ca5948c9adbd23cc9e773bff'>gnu: lean: Update to 3.41.0 and fixes toward cross-compilation.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/lean.scm (lean): Update to 3.41.0.
[phases]: Remove trailing #t.
[tests?] Set to #false when cross-compiling.
[inputs]: Add bash-minimal.

Co-authored-by: Maxime Devos &lt;maximedevos@telenet.be&gt;
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-12-13 17:48:25 +0100'>2021-12-13</span></td><td><a href='/guix/commit/gnu/packages/lean.scm?id=8394619baceb118df92e355377fd543bb1aa501a'>gnu: Simplify package inputs.</a><span class='msg-avail'>...<span class='msg-tooltip'>This commit was obtained by running:

  ./pre-inst-env guix style

without any additional argument.
</span></span></td><td>Ludovic Courtès</td></tr>