BUG/MINOR: http: Add OPTIONS in supported http methods (found by find_http_meth)

The 'OPTIONS' method was not in the list of supported HTTP methods and
find_http_meth return HTTP_METH_OTHER instead of HTTP_METH_OPTIONS.

[wt: this fix needs to be backported at least to 1.5, 1.4 and 1.3]
(cherry picked from commit d57ad648735d228a3fb238d18aa31adfb42e791c)
1 file changed