minor, support alias listing via rotz-alias (with no params)

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'cmd/alias' into next

* cmd/alias:
  minor, support alias listing via rotz-alias (with no params)
minor, provide rotz-combine --into to skip aliasing

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'cmd/combine' into next

* cmd/combine:
  minor, provide rotz-combine --into to skip aliasing
minor, allow reading of symbols or tags from stdin in rotz-show

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'cmd/show' into next

* cmd/show:
  minor, allow reading of symbols or tags from stdin in rotz-show
Merge branch 'next'

* next:
  minor, allow reading of symbols or tags from stdin in rotz-show
  minor, provide rotz-combine --into to skip aliasing
  minor, support alias listing via rotz-alias (with no params)