Add sc_writewait callback

    Invoked before a blocked writer waits for socket to be writable.
    Use in back-mdb to release reader txn while waiting.

James M Leddy authored 13 years ago and Quanah Gibson-Mount committed 10 years ago

From RFC 2782:

  A client MUST attempt to contact the target host with the
  lowest-numbered priority it can reach.

This patch sorts the DNS SRV records by their priority, and
additionally gives records with a larger weight a higher probability
of appearing earlier. This way, the DNS SRV records are tried in the
order of their priority.

Howard Chu authored 10 years ago and Quanah Gibson-Mount committed 10 years ago

Push modifications into response callback; only execute if
main Add actually succeeded.

Howard Chu authored 10 years ago and Quanah Gibson-Mount committed 10 years ago

This was actually broken by 65e163d2, ITS#6947. Reverting both
of those changes and fixing #6947 again.

Howard Chu authored 10 years ago and Quanah Gibson-Mount committed 10 years ago

Due to 89bae499

Drop support for BDB 6.0.20 and later, incompatible license