Implemented initial SSH support. Memory pressure too high for HTTPS and

SSH. Dirty commit.

src/web_security.h

@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-3.0-only */
-/* Persistent HTTPS identity and administrative Basic credentials. */
+/* Persistent HTTPS identity and shared network-administration credentials. */
 
 #pragma once
 
@@ -75,7 +75,14 @@ esp_err_t web_security_copy_tls_material(
 esp_err_t web_security_copy_username(char *output, size_t capacity,
                                      size_t *output_length);
 
-/* Input fields are decoded HTTP Basic components, not the base64 header text. */
+/* Protocol-neutral authentication for the shared HTTPS and SSH administrator. */
+esp_err_t web_security_authenticate_admin(const uint8_t *username,
+                                          size_t username_length,
+                                          const uint8_t *password,
+                                          size_t password_length,
+                                          bool *authenticated);
+
+/* Compatibility name for decoded HTTP Basic components. */
 esp_err_t web_security_authenticate_basic(const uint8_t *username,
                                           size_t username_length,
                                           const uint8_t *password,