Remove renew and replace with check mechanism, remove sudo requirement, add multiple accounts again

src/functions.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace Kelunik\AcmeClient;
+
+use Webmozart\Assert\Assert;
+
+function suggestCommand($badCommand, array $commands, $suggestThreshold = 70) {
+    Assert::string($badCommand, "Bad command must be a string. Got: %s");
+    Assert::integer($suggestThreshold, "Suggest threshold must be an integer. Got: %s");
+
+    $badCommand = strtolower($badCommand);
+
+    $bestMatch = "";
+    $bestMatchPercentage = 0;
+    $byRefPercentage = 0;
+
+    foreach ($commands as $command) {
+        \similar_text($badCommand, strtolower($command), $byRefPercentage);
+
+        if ($byRefPercentage > $bestMatchPercentage) {
+            $bestMatchPercentage = $byRefPercentage;
+            $bestMatch = $command;
+        }
+    }
+
+    return $bestMatchPercentage >= $suggestThreshold ? $bestMatch : "";
+}
+
+function resolveServer($uri) {
+    Assert::string($uri, "URI must be a string. Got: %s");
+
+    $shortcuts = [
+        "letsencrypt" => "https://acme-v01.api.letsencrypt.org/directory",
+        "letsencrypt:production" => "https://acme-v01.api.letsencrypt.org/directory",
+        "letsencrypt:staging" => "https://acme-staging.api.letsencrypt.org/directory",
+    ];
+
+    if (isset($shortcuts[$uri])) {
+        return $shortcuts[$uri];
+    }
+
+    $protocol = substr($uri, 0, strpos($uri, "://"));
+
+    if (!$protocol || $protocol === $uri) {
+        return "https://{$uri}";
+    } else {
+        return $uri;
+    }
+}
+
+function serverToKeyname($server) {
+    $keyFile = str_replace("/", ".", $server);
+    $keyFile = preg_replace("[^a-z0-9._-]", "", $keyFile);
+    $keyFile = preg_replace("\\.+", ".", $keyFile);
+
+    return $keyFile;
+}