* feat(modules): add active web-vuln probe modules
Add five active-probe modules to modules/http: ssti-reflected (arithmetic
eval proof), command-injection (id output, not payload echo), and error-based
xpath, nosql, and ldap injection. Each keys on a transformed response the
payload cannot produce by reflection, so a benign echo cannot trigger it.
* chore(modules): trim redundant module header comments
drop top-line comments that just restate the id/name fields already
present in the same file
