_lower_case reads stdin only. Called as _lower_case "$x", the argument
was dropped and tr read the inherited stdin. On an interactive tty that
never reaches EOF, so dns_baidu hung forever on every add/rm (#7319).
Under cron stdin is /dev/null and the value came back empty: dns_baidu
fell into the default engine order by luck, and the dns_bhosted
fallback error checks could never match.
Fixes#7319
dnsapi/deploy: remove POSIX character classes from sed/grep patterns
Solaris /usr/bin/sed and /usr/bin/grep parse [[:space:]] etc. as a
literal bracket set and silently mis-match. Replace with [ ]* for
JSON matching, a printf-tab bracket for user-input trimming, and
[0-9] for digits; also drop GNU-only sed -r/-E in rage4, selfhost
and selectel, and reuse _strip_blank_lines in byteplus_alb.
neil
neil
Stefan Bottelier