queue.h is included portably, so it shouldn't be included directly.

This seemingly went walkies, so reenabling it.

Don't use '==' for equality matching in sh, as this won't work across all shells. ok @naddy

Ubuntu's default shell is dash, when using /bin/sh. The portable nature of got is such that "$OSTYPE" to determine the host type (linux, bsd, etc.) is bash-specific and is not part of POSIX. autotools already provide a mechanism for determining the underlying platform type, and PLATFORM is already a subst value. Therefore, let the -portable parts of the regress test-suite use $PLATFORM to look at the underlying OS type. The tests themselves already expect /bin/sh to be POSIX-compliant in all other areas, so there should be no need to change the #! lines.

The sed portable wrapper works for inplace editing, but isn't required for just a single stream.

Since the interpreter for the regress shell scripts are using /bin/sh this will usually imply some level of POSIX compliance (that isn't bash-specific, for instance). Some systems use dash as their sh shell and as such is stricter POSIX compliance. To help -portable, make the shell test checks use a single '=' for equality, rather than '=='.

The letter "o" does not overlap with existing options of 'got ref' and is also used by mutt(1) for this purpose.

Make worktree_open part of the build.

This fixes an issue where some references were missing from lists of references sorted by timestamp.

Move a small amount of code from worktree.c to a new file worktree_open.c, which contains everything required to open and close a work tree and inspect some of its basic parameters. This can be used by gotadmin. ok tracey

Replace hand-rolled parentheses with the proper mdoc(7) macro, otherwise the closing ")" ends up inside the command description. Reported by Josh Rickmar, thanks!