mail/dovecot: update 2.3.11.3 -> 2.3.13, fix CVE in non-default config
mail/dovecot-pigeonhole: update 0.5.11 -> 0.5.13

• please note: option VPOPMAIl was removed from upstream

PR: 252415
Submitted by: Evilham <contact@evilham.com>
Reviewed by: fluffy
Approved by: ler (maintainer)
MFH: 2021Q1
Relnotes: https://dovecot.org/pipermail/dovecot-news/2021-January/000448.html

		https://dovecot.org/pipermail/dovecot-news/2021-January/000449.html

Security: CVE-2020-24386, CVE-2020-25275