[PATCH v2] docs: indicate http.sslCertType and sslKeyType

[Andrew Carter <andrew@emailcarter.com>]

0a01d41ee4 (http: add support for different sslcert and sslkey types.,
2023-03-20) added useful SSL config options, but did not document them.

Signed-off-by: Andrew Carter <andrew@emailcarter.com>
---
 Documentation/config/http.txt | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Documentation/config/http.txt b/Documentation/config/http.txt
index a14371b5c9..22a8803dea 100644
--- a/Documentation/config/http.txt
+++ b/Documentation/config/http.txt
@@ -216,6 +216,21 @@ 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.
+	"PEM", "DER" are supported when using openssl or gnutls backends. "P12"
+	is supported on "openssl", "schannel", "securetransport", and gnutls 8.11+.
+	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 "ENG"). Only applicable when using "openssl" backend. "DER"
+	is not supported with openssl. Particularly useful when set to "ENG" for
+	authenticating with PKCS#11 tokens, with a PKCS#11 URL in sslCert option.
+	See also libcurl `CURLOPT_SSLKEYTYPE`. 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
-- 
2.39.5 (Apple Git-154)