function getSuffixPattern(contentType) {
		var suffix = contentType.replace(/^[a-z]+\//, '');
		var suffixPattern = '\\w+/(?:[\\w.-]+\\+)+' + suffix + '(?![+\\w.-])';
		return '(?:' + contentType + '|' + suffixPattern + ')';
	}
Returns a pattern for the given content type which matches it and any type which has it as a suffix.

@param {string} contentType
@returns {string}