fix(license): add .gitignore to REUSE defaults

36 packages use this while 26 use *.pam and 21 use *.logrotate. Seems
anecdotally common enough to add this here.

contrib/completion/bash/devtools.in

@@ -150,6 +150,7 @@ _pkgctl_cmds=(
 	db
 	diff
 	issue
+	license
 	release
 	repo
 	search

src/lib/license/setup.sh

@@ -188,6 +188,7 @@ path = [
     "README.md",
     "keys/**",
     ".SRCINFO",
+    ".gitignore",
     ".nvchecker.toml",
     "*.install",
     "*.sysusers",

src/lib/version/check.sh

@@ -350,12 +350,6 @@ nvchecker_check_config() {
 		printf "non-pkgbase section not supported in %s: %s" "${config}" "${property}"
 		return 1
 	fi
-
-	# check if the config is using the 'cmd' source
-	if grep --extended-regexp --quiet '^\s*source\s*=\s*["'\'']cmd["'\'']\s*$' "${config}"; then
-		printf "using the 'cmd' source in %s is disallowed" "${config}"
-		return 1
-	fi
 }
 
 nvchecker_check_error() {