Re: Non-text mode for pg_dumpall

hi.

-extern void RestoreArchive(Archive *AHX);
+extern void RestoreArchive(Archive *AHX, bool append_data);
Can we spare some words to explain the purpose of append_data.

in get_dbname_oid_list_from_mfile
pg_log_info("map.dat file is not present in dump of
pg_dumpall, so nothing to restore.");
maybe we can change it to
pg_log_info("databases restoring is skipped as map.dat file is
not present in \"%s\"", dumpdirpath);
we can aslo add Assert(dumpdirpath != NULL)

pg_log_info("found dbname as : \"%s\" and db_oid:%u in map.dat file
while restoring", dbname, db_oid);
also need to change. maybe
pg_log_info("found database \"%s\" (OID: %u) in map.dat file while
restoring.", dbname, db_oid);

I also did some minor refactoring, please check attached.

doc/src/sgml/ref/pg_restore.sgml
<refnamediv>
<refname>pg_restore</refname>

<refpurpose>
restore a <productname>PostgreSQL</productname> database from an
archive file created by <application>pg_dump</application>
</refpurpose>
</refnamediv>
need to change, since now we can restore multiple databases.

doc/src/sgml/ref/pg_dumpall.sgml
<refnamediv>
<refname>pg_dumpall</refname>
<refpurpose>extract a <productname>PostgreSQL</productname> database
cluster into a script file</refpurpose>
</refnamediv>
also need change.