[PATCH v6 0/1] http: Add Accept-Language header if possible

Changes since v5

* The tests use `ls-remote` instead of `clone` for tests; I copied the test
  code from ba8e63dc30a80656fddc616f714fb217ad220c04.

* Set cached_accept_langauge to NULL after free it.

* get_accept_language() returns a pointer to const char instead of strbuf; the
  type of cached_accept_language also has been changed to char* from strbuf*

* write_accept_language(), which is extracted from get_accept_language(),
  respects MAX_SIZE_OF_HEADER.

* The for-loop in write_accept_language() works correctly if lang_begin points
  an empty string.

* get_preferred_languages() considers LC_MESSAGES only if NO_GETTEXT is not
  defined.

* Remove the tests for LC_MESSAGES, LANG and LC_ALL.

Yi EungJun (1):
  http: Add Accept-Language header if possible

 http.c                     | 173 +++++++++++++++++++++++++++++++++++++++++++++
 remote-curl.c              |   2 +
 t/t5550-http-fetch-dumb.sh |  32 +++++++++
 3 files changed, 207 insertions(+)