rgw: update civetweb to 1.1

rgw: update civetweb to 1.1

Introduces the following additions in rgw:
- allow_unicode_in_urls introduced with a corresponding downstream commit in
civetweb, as the newer version of civetweb validates that urls are url encoded
which swifttests do not follow, so introduce this as a configurable which we set
as true
- mg header struct changes in civetweb update, use auto here
- drop info->uri and use local_uri instead as the former is deprecated

wip: rgw: civetweb fixes for v1.1 upgrade

Signed-off-by: Abhishek Lekshmanan <abhishek@suse.com>