Merge branch 'mf/curl-select-fdset' into maint

* mf/curl-select-fdset:
http: drop "local" member from request struct
http.c: Rely on select instead of tracking whether data was received
http.c: Use timeout suggested by curl instead of fixed 50ms timeout
http.c: Use curl_multi_fdset to select on curl fds instead of just sleeping

diff --cc http.c
Simple merge

diff --cc http.h
index 3c332a98e9358a296b937453351018ac1042120e,368bc0e80aa7d986893dfac32ae655599cdbc431..ee1606942a9716b45da937873949220ab7f8092b
--- 1/http.h
--- 2/http.h
+++ b/http.h
@@@ -86,10 -85,9 +85,9 @@@ extern void add_fill_function(void *dat
  extern void step_active_slots(void);
  #endif
  
 -extern void http_init(struct remote *remote);
 +extern void http_init(struct remote *remote, const char *url);
  extern void http_cleanup(void);
  
- extern int data_received;
  extern int active_requests;
  extern int http_is_verbose;
  extern size_t http_post_buffer;