IRRd 4.0.0 release candidate 5

ae2940b Only perform source ordering when needed for improved performance.
67c61f1 Fix validation of configuration files for timers.
54e60fa Improve performance.
7d15f1d Fix minor issues in integration test.
87e509f Add a small load testing script.
5380035 Change log "received query" to more correct "processing query"
ede8b3d Add log for elapsed time for processing query.

IRRd 4.0.0 release candidate 4

Optimised and simplified query pipeline implementation. This may especially have a significant impact when sending many queries to IRRd at once, and may bring performance improvements in other scenarios too.

IRRd 4.0.0 release candidate 3

• Fix #171 - make !! queries return no response.
• Fix #165 - Document option of using setcap to run as non-privileged user
• Fix #170 - Add docs for status page.
• Fix issue where last_updated for a source would update for exports as well.
• Fix minor grammar error in query docs.

IRRd 4.0.0 release candidate 2

• Most importantly, fixes #169, which could cause failures or incorrect results for queries, especially in automated processes.
• Fixes #166, a file left open when reading the configuration.
• Fixes #163, an incorrectly documented parameter to irrd_database_upgrade.
• Fixes #164, which could cause failures when loading the HTTP status page.

IRRd 4.0.0 release candidate 1

First release candidate for IRRd 4.