Clear the search highlighting when replacing the content of a diff view ('<', '>', '[', ']', 'a', 'w') or a blame view ('b', 'p', 'B'). Previously the position would remain highlighted even if the text there had changed. ok stsp@ or a blame view

reported by and fix confirmed by naddy

ok naddy@

millert@ suggests that this check is not needed, and that ideally we should be using close-on-exec instead. I will look into this, but in the meantime this change will help -portable: https://bugs.gentoo.org/828003

ok naddy tracey

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.