`devel`→`master`: Commits for v1.4.0 (#188)

[Olf0]

• No absolute paths to sh

• Add changelog entry

• Update harbour-storeman-installer.spec

• No || true

• expr→$(( )), enhance code flow, update comment

• Align with v2.0.50 & double-fork-in-shell.md

• Update changlog with recent entries from v2

• Align with v2.0.50

• Align entries with v2.0.50

• Update web-links in double-fork-in-shell-code.md

• Version increase and changelog entries

• Fix (#189)

• Update two web-links (#190)

• Fixes (#191)

• Fix

• Update harbour-storeman-installer.spec

• Update harbour-storeman-installer.spec

• Align changelog

• Swap waits

• Update the two web-links again