net-im/gomuks: Fix runtime within a tmux session

An upstream change [1] made it a requirement to have `infocmp` installed
for parsing terminal capabilities within a tmux session.

While ncurses from base works perfectly fine with gomuks, base does not
ship with `infocmp` thus creating a hard dependency to devel/ncurses.

Patch port to revert upstream change.

[1] https://github.com/tulir/tcell/commit/aef08b141333dfbaad8a7f0c187d7ab7d2b203c9
    https://github.com/tulir/tcell/blob/bb9a2b9b1937b1ede6a00450b2650b7b0befe2fc/terminfo/dynamic/dynamic.go#L121

PR:		263213
Upstream issue:	https://github.com/tulir/gomuks/issues/363
Reported by:	parakleta@darkreality.org

net-im/gomuks/Makefile

@@ -3,7 +3,7 @@
 PORTNAME=	gomuks
 PORTVERSION=	0.2.4
 DISTVERSIONPREFIX=	v
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	net-im
 
 MAINTAINER=	ehaupt@FreeBSD.org

net-im/gomuks/files/patch-vendor_maunium.net_go_tcell_tscreen.go

+--- vendor/maunium.net/go/tcell/tscreen.go.orig	2022-04-12 11:45:41 UTC
++++ vendor/maunium.net/go/tcell/tscreen.go
+@@ -50,13 +50,9 @@ const (
+ // $COLUMNS environment variables can be set to the actual window size,
+ // otherwise defaults taken from the terminal database are used.
+ func NewTerminfoScreen() (Screen, error) {
+-	term := os.Getenv("TERM")
+-	if len(term) >= 6 && term[:6] == "screen" && len(os.Getenv("TMUX")) > 0 {
+-		term = "tmux"
+-	}
+-	ti, e := terminfo.LookupTerminfo(term)
++	ti, e := terminfo.LookupTerminfo(os.Getenv("TERM"))
+ 	if e != nil {
+-		ti, e = loadDynamicTerminfo(term)
++		ti, e = loadDynamicTerminfo(os.Getenv("TERM"))
+ 		if e != nil {
+ 			return nil, e
+ 		}