net/gerbera: Update to 1.9.1

[diizzy]

Summary

Update Gerbera to 1.9.1
Update maintainer entry
Partially backport upstream commit to fix compilation when libinotify is used

Changelog: https://github.com/gerbera/gerbera/releases/tag/v1.9.1
Reference:
https://github.com/gerbera/gerbera/commit/3a29599b8ca82c0cf59392fc1495d32c88580a18

Test Plan

Compile and runtime tested on FreeBSD 13.0-STABLE #0 stable/13-n246086-a20c597c6d7 (amd64) (make, make check-plist)
Poudriere testport OK 12.2-RELEASE (amd64)
Poudriere testport OK 11.4-RELEASE (amd64)

[tcberner]

net/gerbera/Makefile

6

^ you could create a single review to make this change for the rest of your ports