RedirectManager: Always quote the context prefix if used in a regular expression

[kwin]

Currently the context prefix is used as is in the redirect manager (

acs-aem-commons/bundle/src/main/java/com/adobe/acs/commons/redirects/models/RedirectConfiguration.java

Line 197 in 575647b

rulePattern = RedirectRule.toRegex(contextPrefix + rulePattern.toString(), nc);

). This does not work well if the context prefix contains characters which require quoting in regular expressions (like .). So the context prefix should always be treated as literal and therefore be prefixed to the pattern with https://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html#quote-java.lang.String-

[kwin]

The challenge with that is that the context prefix is conditionally prepended, however in regular expression there are multiple ways to escape things so a simple comparison like

acs-aem-commons/bundle/src/main/java/com/adobe/acs/commons/redirects/models/RedirectConfiguration.java

Line 196 in 575647b

if(!rulePattern.toString().startsWith(contextPrefix)) {

does not work well.