clang-tidy: sync argument names in prototype and definition

Discovered with clang-tidy checker
`readability-inconsistent-declaration-parameter-name`.

Also:
- do not enforce the above because of inconsistencies still present
  between public API prototypes and definitions. (Also betwen man page
  protos, and man page examples, and other parts of the code, e.g.
  `easy` vs `curl` vs `d` vs `handle`) Perhaps subject for a future
  effort:
  https://github.com/curl/curl/actions/runs/22166472728/job/64094691653
- enable and fix `readability-named-parameter` where missing.

Refs:
https://clang.llvm.org/extra/clang-tidy/checks/readability/inconsistent-declaration-parameter-name.html
https://clang.llvm.org/extra/clang-tidy/checks/readability/named-parameter.html

Closes #20624

lib/url.h

@@ -36,14 +36,16 @@ void Curl_init_userdefined(struct Curl_easy *data);
 void Curl_freeset(struct Curl_easy *data);
 CURLcode Curl_uc_to_curlcode(CURLUcode uc);
 CURLcode Curl_close(struct Curl_easy **datap); /* opposite of Curl_open() */
-CURLcode Curl_connect(struct Curl_easy *, bool *async, bool *protocol_connect);
+CURLcode Curl_connect(struct Curl_easy *data,
+                      bool *asyncp,
+                      bool *protocol_done);
 CURLcode Curl_setup_conn(struct Curl_easy *data,
                          struct Curl_dns_entry *dns,
                          bool *protocol_done);
 void Curl_conn_free(struct Curl_easy *data, struct connectdata *conn);
 CURLcode Curl_parse_login_details(const char *login, const size_t len,
-                                  char **userptr, char **passwdptr,
-                                  char **optionsptr);
+                                  char **userp, char **passwdp,
+                                  char **optionsp);
 
 /* Attach/Clear/Get meta data for an easy handle. Needs to provide
  * a destructor, will be automatically called when the easy handle