Minor code & compiler warning cleanups
- gitlab CI: stop requiring
Signed-off-byin commits - Rename several function arguments to avoid
-Wshadowwarnings unifdef -UNOTDEF b4light.c- Drop
X_NOT_POSIXsupport
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Signed-off-by in commits-Wshadow warningsunifdef -UNOTDEF b4light.cX_NOT_POSIX support