4.4.0-109.132) is not available, but a newer one is (4.4.0-142.168). We redirected you there.
/usr/include/GNUstep/SOGo is in sogo 2.1.1b-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/include/GNUstep/../../lib/GNUstep/Frameworks/SOGo.framework/Headers