Apply spelling corrections from Fossies spellcheck

See https://fossies.org/features.html#codespell
Spelling issues in Git commit messages or lib/* source are not applied.

* README.OS2.template: Apply spelling corrections.
* README.VMS: Ditto.
* src/commands.c: Ditto.
* src/config.ami.template: Ditto.
* src/configh.dos.template: Ditto.
* src/job.c: Ditto.
* src/job.h: Ditto.
* src/read.c: Ditto.
* src/variable.c: Ditto.
* src/vms_exit.c: Ditto.
* src/vms_export_symbol.c: Ditto.
* src/vms_progname.c: Ditto.
* src/vmsfunctions.c: Ditto.
* src/vmsjobs.c: Ditto.
* src/w32/pathstuff.c: Ditto.
* tests/scripts/variables/automatic: Ditto.
* tests/test_driver.pl: Ditto.
17 files changed