more: restore exit-on-eof if POSIXLY_CORRECT is not set

In version 2.38, exit-on-eof has been disabled by default. This change
is annoying for users and forces many users to use 'alias more="more
-e"'. It seems better to force POSIX lovers to use POSIXLY_CORRECT
env. variable and stay backwardly compatible by default.

Addresses: #1703
Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=2088493
Signed-off-by: Karel Zak <kzak@redhat.com>

text-utils/more.1.adoc

@@ -66,7 +66,7 @@ Prompt with "[Press space to continue, 'q' to quit.]", and display "[Press 'h' f
 Do not pause after any line containing a *^L* (form feed).
 
 *-e*, *--exit-on-eof*::
-Exit on End-Of-File, enabled by default if not executed on terminal.
+Exit on End-Of-File, enabled by default if POSIXLY_CORRECT environment variable is not set or if not executed on terminal.
 
 *-f*, *--no-pause*::
 Count logical lines, rather than screen lines (i.e., long lines are not folded).

text-utils/more.c

@@ -2052,8 +2052,11 @@ int main(int argc, char **argv)
 	if (!(strcmp(program_invocation_short_name, "page")))
 		ctl.no_scroll++;
 
+	ctl.exit_on_eof = getenv("POSIXLY_CORRECT") ? 0 : 1;
+
 	if ((s = getenv("MORE")) != NULL)
 		env_argscan(&ctl, s);
+
 	argscan(&ctl, argc, argv);
 
 	/* clear any inherited settings */