refactor: network - harden TCP/IP and unify HTTP clients

programs/src/wikipedia/wikipedia.h

@@ -14,7 +14,7 @@
 #include <gui/standalone.hpp>
 #include <gui/svg.hpp>
 #include <gui/truetype.hpp>
-#include <tls/tls.hpp>
+#include <http/http.hpp>
 
 extern "C" {
 #include <string.h>
@@ -190,8 +190,6 @@ void     underscores_to_spaces(char* text);
 bool     is_main_page_query(const char* query);
 unsigned decode_utf8_codepoint(const char* buf, int len, int* consumed);
 
-int find_header_end(const char* buf, int len);
-int parse_status_code(const char* buf, int len);
 int find_substr(const char* buf, int len, const char* needle);
 
 int url_encode_title(const char* in, char* out, int maxLen);
@@ -219,7 +217,7 @@ bool handle_reader_option_click(int mx, int my);
 // network.cpp -- TLS fetch, welcome fetch, search
 // ============================================================================
 
-int  wiki_fetch(const char* path, char* respBuf, int respMax);
+http::Response wiki_fetch(const char* path, char* respBuf, int respMax);
 bool ensure_wiki_tls_ready(char* err, int err_len);
 bool welcome_feed_path(char* path, int path_len);
 void do_welcome_fetch();