bin/52410: Please make test support == as a syonym for =

[coypu%sdf.org@localhost]

>Number:         52410
>Category:       bin
>Synopsis:       Please make test support == as a syonym for =
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Sun Jul 16 11:40:00 +0000 2017
>Originator:     coypu
>Release:        NetBSD 8.99.1
>Organization:
>Environment:
NetBSD loggy 8.99.1 NetBSD 8.99.1 (GENERIC) #82: Thu Jun 22 15:45:33 IDT 2017  fly@loggy:/home/fly/obj/sys/arch/amd64/compile/GENERIC amd64

>Description:
For other programming languages, = is used for assignment and == for equality, and people often try ==.
other shells support this, so the authors of other scripts won't see the breakage, only we will.
>How-To-Repeat:

>Fix: