Upgrade x11-servers/Xfstt from 1.9.2 to 1.9.3

Release note:
Documentation:

• Switch to https for hadrons.org URLs. Code cleanup
• Check strSubFamily for emptiness when assigning it.
• Use matching delete [] operator for new [].
• Use std::string instead of static buffers.
• Check error failures from socket() call.
• Do no dereference TTFont variable before using it.
• Use memcpy() instead of strncpy() to copy a fixed-length string.
• Initialize structs that go over the wire to 0.
• Remove pathname length check.