www/lagrange: update 1.16.5 → 1.17.6

Fix several crashes and memory leaks.
Fix build on 15-CURRENT.

Changelogs:
https://github.com/skyjake/lagrange/releases/tag/v1.16.6
https://github.com/skyjake/lagrange/releases/tag/v1.16.7
https://github.com/skyjake/lagrange/releases/tag/v1.17.0
https://github.com/skyjake/lagrange/releases/tag/v1.17.1
https://github.com/skyjake/lagrange/releases/tag/v1.17.2
https://github.com/skyjake/lagrange/releases/tag/v1.17.3
https://github.com/skyjake/lagrange/releases/tag/v1.17.4
https://github.com/skyjake/lagrange/releases/tag/v1.17.5
https://github.com/skyjake/lagrange/releases/tag/v1.17.6

PR: 274414 276190
Approved by: lcook (maintainer, timeout > 6 months)
MFH: 2024Q3

(cherry picked from commit b04495aa52fc2e75bfbeea6670de6c5c52c944db)