* include/wget/wget.h: Add flag 'proxied' to wget_http_connection_t,
add arg 'proxied' to wget_http_request_to_buffer(),
add new function declaration wget_http_set_no_proxy(),
add new function declaration wget_http_match_no_proxy().
* libwget/http.c: Add variable 'no_proxies',
(wget_http_open): Check host against 'no_proxy' and set 'conn->proxied'
when appropriate,
(wget_http_send_request): Call wget_http_request_to_buffer() with
conn->proxied,
(wget_http_request_to_buffer): Check 'proxied',
(_parse_proxies): Cleanup,
(_parse_no_proxies): New function,
(wget_http_set_no_proxy): New function,
(wget_http_match_no_proxy): New function
* libwget/init.c (wget_global_deinit): Free no_proxy memory
* libwget/ip.c: Add code in comments (for later use)
* libwget/utils.c (wget_match_tail, wget_match_tail_nocase): Cleanup
* src/options.c (init): Handle 'no_proxy' env variable
* src/wget_options.h (struct config): Add no_proxy member
* bootstrap.conf: Add gnulib module 'inet_pton'
* docs/Makefile.am: Add man page libwget-ip.3
* wget/wget.h (struct wget_iri_st): New field 'is_ip_address'.
* libwget/Makefile.am: Add new file ip.c
* libwget/ip.c: New file defining new function wget_ip_is_family()
* libwget/iri.c (wget_iri_parse): Check for literal IP address
* src/wget.c: Do not add to HSTS if literal IP address
