Remove useless comment in nginx test configs

Don't request the certificate until the ACME status is Ready

Use -r option for dig to force default dig output

Fixes #630

Add the ability to set several reload commands

Use a bash array to set several commands. (Commands use the usual syntax.)
The current syntax is unchanged when setting a single command.

Add FTP_OPTIONS (passive support)

Fix double slash when using root directory with DAVS

Show error if running in posix mode

Add tests for bash 4.0, 4.2, 5.0

Fix dig SOA lookup

Handle dig failure

Test using Dynu.com as well as Duckdns.org

Issue #614: Fix delimiter issues with ${alldomains[]} in create_csr()