Metalink support.

* bootstrap.conf: Add crypto/sha256
* configure.ac: Look for libmetalink and GPGME
* doc/wget.texi: Add --input-metalink and --metalink-over-http
options description.
* po/POTFILES.in: Add metalink.c
* src/Makefile.am: Add new translation unit (metalink.c)
* src/http.c (http_stat): Add metalink field.
(free_stat): Free metalink field.
(find_key_value): Find value of given key in header string.
(has_key): Check if token exists in header string.
(find_key_values): Find all key=value pairs in header string.
(metalink_from_http): Obtain Metalink metadata from HTTP response.
(gethttp): Call metalink_from_http if requested.
(http_loop): Request Metalink metadata from HTTP response if should be.
Fall back to regular download if no Metalink metadata found.
* src/init.c: Add --input-metalink and --metalink-over-http options
* src/main.c (option_data): Handle --input-metalink and
--metalink-over-http cmd arguments.
(print_help): Print --input-metalink option description.
(main): Retrieve files from Metalink file
* src/metalink.c (retrieve_from_metalink): Download files described by
metalink.
(metalink_res_cmp): Comparator for resources priority-sorting.
* src/metalink.h: Create header for metalink.c
(RES_TYPE_SUPPORTED): Define supported resources media.
(DEFAULT_PRI): Default mirror priority for Metalink over HTTP.
(VALID_PRI_RANGE): Valid priority range.
* src/options.h (options): Add input_metalink option and metalink_over_http
options.
* src/utils.c (hex_to_string): Convert binary data to ASCII-hex.
* src/utils.h (hex_to_string): Add prototype.
* src/wget.h: Add metalink-related error enums
Add METALINK_METADATA flag for document type.

1 files changed, 1 insertions, 0 deletions

diff --git a/po/POTFILES.in b/po/POTFILES.in
index 5406e0fc..0af89dcb 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -26,6 +26,7 @@ src/init.c
 src/iri.c
 src/log.c
 src/main.c
+src/metalink.c
 src/mswindows.c
 src/netrc.c
 src/openssl.c