Add support for newrelic on PHP 8.4, fix installing newrelic on PHP 7.0/7.1

[javespi]

Last week newrelic releases support of PHP 8.4:

• https://docs.newrelic.com/docs/release-notes/agent-release-notes/php-release-notes/php-agent-11-5-0-18/

[javespi]

Hey @mlocati, looks like agent is no longer supported for 7.0 and 7.1 and I guess we are downloading latest version of extension in the script you did (#910).

What do you think is best here? Should we drop too supporting those 2 versions? CI is failing in PHP 7.1 if I'm not wrong

https://docs.newrelic.com/docs/apm/agents/php-agent/getting-started/php-agent-compatibility-requirements/

I'll remove those 2 versions unless you think there is any other workaround

Thank you!

[mlocati]

Instead of dropping support for old PHP versions, what about changing the installNewRelic function this way?

 installNewRelic() {
 	printf '# Installing newrelic\n'
+	# see https://docs.newrelic.com/docs/apm/agents/php-agent/getting-started/php-agent-compatibility-requirements/
+	if test $PHP_MAJMIN_VERSION -le 701; then
+		installNewRelic_baseUrl=https://download.newrelic.com/php_agent/archive/10.21.0.11/
+	else
+		installNewRelic_baseUrl=https://download.newrelic.com/php_agent/release/
+	fi
 	installNewRelic_search='\bnewrelic-php[0-9.]*-[0-9]+(\.[0-9]+)*-linux'
 	case "$DISTRO" in
 		alpine)
 			installNewRelic_search="$installNewRelic_search-musl"
 			;;
 	esac
-	installNewRelic_file="$(curl -sSLf -o- https://download.newrelic.com/php_agent/release/ | sed -E 's/<[^>]*>//g' | grep -Eo "$installNewRelic_search.tar.gz" | sort | head -1)"
-	installNewRelic_url="https://download.newrelic.com/php_agent/release/$installNewRelic_file"
+	installNewRelic_file="$(curl -sSLf -o- "$installNewRelic_baseUrl" | sed -E 's/<[^>]*>//g' | grep -Eo "$installNewRelic_search.tar.gz" | sort | head -1)"
+	installNewRelic_url="$installNewRelic_baseUrl$installNewRelic_file"

[javespi]

@mlocati thank you! Already commit the change 😉