SSL connection abort screws up logger pipe

While testing the logger subprocess, I found that I get a
"could not read from system logger pipe: Too many open files" if I abort
a SSL connection.

After that, the ereport(FATAL) will screw up the backend, semctl etc (To
fix this, I'm using ereport(COMMERROR) and exit(1) now, logger will
restart gracefully).

It appears that the SSL connection cleanup code does some harmful stuff
to the logger pipe, while the normal cleanup code will leave the pipe
workable.

Regards,
Andreas