document http.sslCertType and sslKeyType

These useful config options were added in 0a01d41 but lacked documentation.

Signed-off-by: Andrew Carter <[email protected]>

Documentation/config/http.txt

@@ -216,6 +216,16 @@ http.sslBackend::
 	This option is ignored if cURL lacks support for choosing the SSL
 	backend at runtime.
 
+http.sslCertType::
+	Type of client certificate used when fetching or pushing over HTTPS.
+	(e.g. "PEM", "DER", or "P12"). See also libcurl `CURLOPT_SSLCERTTYPE`
+	Can be overridden by the `GIT_SSL_CERT_TYPE` environment variable.
+
+http.sslKeyType::
+	Type of client private key used when fetching or pushing over HTTPS.
+	(e.g. "PEM", "DER", or "P12"). See also libcurl `CURLOPT_SSLCERTTYPE`
+	Can be overridden by the `GIT_SSL_KEY_TYPE` environment variable.
+
 http.schannelCheckRevoke::
 	Used to enforce or disable certificate revocation checks in cURL
 	when http.sslBackend is set to "schannel". Defaults to `true` if