Maybe BRE aren't as basic as they sound. But I'm sure `man grep` didn't list the extra syntax of "preceded by backslash" :) So let's use it
(( ... isn't it annoying that basic regex has * but not + ..... ))
Added Leaseweb API for dns-01 verification
fix https://github.com/Neilpang/acme.sh/pull/2553
Use more widely supported options for the "tr" command line utility b…y removing the use of the character class representation option. [:space:] => "\t\r\n\v\f"
dnsapi/dns_miab.sh MIAB DNS-01 Validation
nic.ru dnsapi
Extra space on empty line 27.