pgsql: Improve autovacuum logging for aggressive and anti-wraparoundru

Improve autovacuum logging for aggressive and anti-wraparound runs

A log message was being generated when log_min_duration is reached for
autovacuum on a given relation to indicate if it was an aggressive run,
and missed the point of mentioning if it is doing an anti-wrapround
run.  The log message generated is improved so as one, both or no extra
details are added depending on the option set.

Author: Sergei Kornilov
Reviewed-by: Masahiko Sawada, Michael Paquier
Discussion: https://postgr.es/m/11587951532155118@sas1-19a94364928d.qloud-c.yandex.net

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/28a8fa984c63fd525ab03c469f293e957619654b

Modified Files
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src/backend/commands/vacuumlazy.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)