sed in CURRENT fails in textproc/jq

[Yuri]

Either something has changed in sed(1) in CURRENT, or sed just fails 
during the configure stage of textproc/jq:

sed: No error: 0
checking for sys/cygwin.h... eval: ${+...}: Bad substitution

See the log: 
https://pkg-status.freebsd.org/beefy18/data/main-amd64-default/peb032111a352_s9c80d66ec1/logs/jq-1.7.log



Yuri