Update texinfo
Use the right compiler to compile C constants files

gcc had been kept hardcoded in constants.sh, while it should have
been replaced by the right compiler.
Release 1.8.11
Fix style issues
Release 1.8.12
Support joining multicast group on specific interface

Change required in function Create_Multicast_Socket to support
joining multicast group on specific interface (relevant in
hosts that have multiple interfaces):

- Call procedure Bind with Host => Local_If
- Set Mreq.Imr_Interface to 0.0.0.0 before call to
  Setsockopt_Add_Membership
Add TCP_NODELAY flag

src/sockets.ads
- At type Socket_Option add value TCP_NODELAY
src/sockets.adb
- Add element for new Socket_Option value TCP_NODELAY
  in constant arrays Socket_Option_Match and Socket_Option_Size
Update build infrastructure
Mark uninitialized sockets as being shut down

This will allow procedures such as Send or Receive to raise a
Connection_Closed exception when trying to use an uninitialized
socket.
Add functions to retrieve incoming and outgoing queue sizes on Linux
Replace references to the mailing-list with the tracker
Release 1.9