fix, PEBKAC, reset _ofn[] template array every time wr_man_include() is called

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
hygiene, give indicative errors why opening include files could fail

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

* cmd/genman:
  hygiene, give indicative errors why opening include files could fail
  fix, PEBKAC, reset _ofn[] template array every time wr_man_include() is called
minor, provide --info-page to genman command

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

* cmd/genman:
  minor, provide --info-page to genman command
minor, make bracket and paren substitution in bootstrap mode as well

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'bld/dist'

* bld/dist:
  minor, make bracket and paren substitution in bootstrap mode as well