Fix unable to parse SSL version (#2981)

* On some systems OpenSSL version cannot be parsed. When this cannot be parsed, do not force exit, allow the client to continue operations. If the OpenSSL version string is not empty, display the unparsable string when using --verbose for future debugging if required.

src/util.d

@@ -1446,31 +1446,31 @@ void checkOpenSSLVersion() {
 
 	auto matches = versionString.match(versionRegex);
 	if (matches.empty) {
-		addLogEntry("Unable to parse OpenSSL version.");
-		// Must force exit here, allow logging to be done
-		forceExit();
-	}
-
-	// Extract major, minor, patch, and optional letter parts
-	uint major = matches.captures[1].to!uint;
-	uint minor = matches.captures[2].to!uint;
-	uint patch = matches.captures[3].to!uint;
-	string letter = matches.captures[4]; // Empty if version is 3.x.x or higher
-	string distributionWarning = "         Please report this to your distribution, requesting an update to a newer OpenSSL version, or consider upgrading it yourself for optimal stability.";
-
-	// Compare versions
-	if (major < 1 || (major == 1 && minor < 1) || (major == 1 && minor == 1 && patch < 1) ||
-		(major == 1 && minor == 1 && patch == 1 && (letter.empty || letter[0] < 'a'))) {
+		if (!versionString.empty) {
+			if (verboseLogging) {addLogEntry("Unable to provided parse OpenSSL version: " ~ versionString, ["verbose"]);}
+		}
+	} else {
+		// Extract major, minor, patch, and optional letter parts
+		uint major = matches.captures[1].to!uint;
+		uint minor = matches.captures[2].to!uint;
+		uint patch = matches.captures[3].to!uint;
+		string letter = matches.captures[4]; // Empty if version is 3.x.x or higher
+		string distributionWarning = "         Please report this to your distribution, requesting an update to a newer OpenSSL version, or consider upgrading it yourself for optimal stability.";
+
+		// Compare versions
+		if (major < 1 || (major == 1 && minor < 1) || (major == 1 && minor == 1 && patch < 1) ||
+			(major == 1 && minor == 1 && patch == 1 && (letter.empty || letter[0] < 'a'))) {
+				addLogEntry();
+				addLogEntry(format("WARNING: Your OpenSSL version (%d.%d.%d%s) is below the minimum required version of 1.1.1a. Significant operational issues are likely when using this client.", major, minor, patch, letter), ["info", "notify"]);
+				addLogEntry(distributionWarning);
+				addLogEntry();
+		} else if (major == 1 && minor == 1 && patch == 1 && !letter.empty && letter[0] >= 'a' && letter[0] <= 'w') {
 			addLogEntry();
-			addLogEntry(format("WARNING: Your OpenSSL version (%d.%d.%d%s) is below the minimum required version of 1.1.1a. Significant operational issues are likely when using this client.", major, minor, patch, letter), ["info", "notify"]);
+			addLogEntry(format("WARNING: Your OpenSSL version (%d.%d.%d%s) may cause stability issues with this client.", major, minor, patch, letter), ["info", "notify"]);
 			addLogEntry(distributionWarning);
 			addLogEntry();
-	} else if (major == 1 && minor == 1 && patch == 1 && !letter.empty && letter[0] >= 'a' && letter[0] <= 'w') {
-		addLogEntry();
-		addLogEntry(format("WARNING: Your OpenSSL version (%d.%d.%d%s) may cause stability issues with this client.", major, minor, patch, letter), ["info", "notify"]);
-		addLogEntry(distributionWarning);
-		addLogEntry();
-	} else if (major >= 3) {
-		// Do nothing for version >= 3.0.0
+		} else if (major >= 3) {
+			// Do nothing for version >= 3.0.0
+		}
 	}
 }