bugfix: fix build error with nginx >= 1.23.0

[somnisomni]

This will fix #132 .

cookies field name just renamed to cookie, according to nginx/nginx@3aef1d6 .

[eilandert]

please merge ;-)

[RekGRpth]

test t/input-cookie.t TEST 4 seg faults!

[RekGRpth]

cookies field name just renamed to cookie

NOT! but Multi headers are now using linked lists instead of arrays!!!

[RekGRpth]

I suggest You should drop ngx_http_set_builtin_multi_header and replace it use by ngx_http_set_builtin_header

[somnisomni]

Okay maybe I missed something from nginx's commit. I think #136 fix this rest issue of this PR, but am I still have to follow @RekGRpth's suggestion:

I suggest You should drop ngx_http_set_builtin_multi_header and replace it use by ngx_http_set_builtin_header

?

[hnakamur]

I ran t/bug.t with ngx_http_set_builtin_header for Cache-Control and with openresty/lua-nginx-module#2063

    { ngx_string("Cache-Control"),
                 offsetof(ngx_http_headers_out_t, cache_control),
                 ngx_http_set_builtin_header },

TEST 13 fails:

$ TEST_NGINX_BINARY=/path/to/my/nginx prove t/bug.t 
t/bug.t .. 1/112 
#   Failed test 't/bug.t TEST 13: set multi values to cache-control and override it with multiple values (to reproduce a bug) - header Cache-Control ok'
#   at /usr/local/share/perl/5.34.0/Test/Nginx/Socket.pm line 1010.
#          got: 'no-store, foo, bar, baz, blah'
#     expected: 'blah'

#   Failed test 't/bug.t TEST 13: set multi values to cache-control and override it with multiple values (to reproduce a bug) - response_body - response is expected (repeated req 0, req 0)'
#   at /usr/local/share/perl/5.34.0/Test/Nginx/Socket.pm line 1665.
#          got: "Cache-Control: no-store, foo, bar, baz, blah\x{0a}"
#       length: 45
#     expected: "Cache-Control: blah\x{0a}"
#       length: 20
#     strings begin to differ at char 16 (line 1 column 16)

#   Failed test 't/bug.t TEST 13: set multi values to cache-control and override it with multiple values (to reproduce a bug) - header Cache-Control ok'
#   at /usr/local/share/perl/5.34.0/Test/Nginx/Socket.pm line 1010.
#          got: 'no-store, foo, bar, baz, blah'
#     expected: 'blah'

#   Failed test 't/bug.t TEST 13: set multi values to cache-control and override it with multiple values (to reproduce a bug) - response_body - response is expected (repeated req 1, req 0)'
#   at /usr/local/share/perl/5.34.0/Test/Nginx/Socket.pm line 1665.
#          got: "Cache-Control: no-store, foo, bar, baz, blah\x{0a}"
#       length: 45
#     expected: "Cache-Control: blah\x{0a}"
#       length: 20
#     strings begin to differ at char 16 (line 1 column 16)
t/bug.t .. 107/112 # Looks like you failed 4 tests of 112.
t/bug.t .. Dubious, test returned 4 (wstat 1024, 0x400)
Failed 4/112 subtests 

Test Summary Report
-------------------
t/bug.t (Wstat: 1024 Tests: 112 Failed: 4)
  Failed tests:  8-9, 11-12
  Non-zero exit status: 4
Files=1, Tests=112,  4 wallclock secs ( 0.03 usr  0.01 sys +  0.36 cusr  0.15 csys =  0.55 CPU)
Result: FAIL

On the other hand, with #136 and openresty/lua-nginx-module#2063, all tests in t/bug.tpasses:

$ TEST_NGINX_BINARY=/path/to/my/nginx prove t/bug.t 
t/bug.t .. ok       
All tests successful.
Files=1, Tes