Issue #2389335 by Berdir, naveenvalecha, claudiu.cristea, almaudoh, joachim, jibran: Deprecate entity.query service and replace with using the entity storage's getQuery() method

Issue #2478483 by Wim Leers, Fabianx: Introduce placeholders (#lazy_builder) to replace #post_render_cache

Issue #2350273 by larowlan, andypost: Move CommentViewBuilder::renderLinks post_render_cache callback to CommentPostRenderCache

Issue #2398075 by andypost, sarav.din33, larowlan, nemethf, hussainweb: Breadcrumbs for comment entity

Issue #2318251 by larowlan: Fixed Make comment links functionality testable and convert CommentLinkTest to PHPUnit.

Issue #2097123 by andypost, roderik, slashrsm, das-peter, mgifford, pfrenssen, YesCT | larowlan: Deprecate comment_num_new() in favour of method on CommentManager.

Revert "Issue #2097123 by slashrsm, roderik, mgifford, pfrenssen, andypost, das-peter | larowlan: Deprecate comment_num_new() in favour of method on CommentManager."

This reverts commit 6532718c.

Issue #2097123 by slashrsm, roderik, mgifford, pfrenssen, andypost, das-peter | larowlan: Deprecate comment_num_new() in favour of method on CommentManager.

Issue #2247779 by Wim Leers, larowlan, dawehner: Allow #pre_render, #post_render and #post_render_cache callbacks to be service methods.

Issue #2228763 by larowlan, alexpott, martin107, jessebeach, xjm: Create a comment-type config entity and use that as comment bundles, require selection in field settings form.

Issue #2182055 by dawehner, andypost, juampy, linclark: Comment module causes Circular reference error on a REST request.

Issue #1987396 by joelpittet, andypost, jenlampton, Hydra, larowlan, Cottser, brunodbo: Refactor & Clean-up comment.module theme functions.

Issue #2098011 by larowlan: Support dynamic route parameters to enhance comment admin paths with entity type and field name from comment bundle.

Issue #2099095 by jibran, tim.plunkett: Create BreadcrumbBuilderBase and remove the boilerplate code from BreadcrumbBuilders.

Issue #2091411 by damiankloip, dawehner: Provide an easier mechanism for a route definition wrapped by module_exists().

Issue #731724 by larowlan, andypost, dixon_, tsvenson: Convert comment settings into a field to make them work with CMI and non-node entities.

Issue #1978958 by jibran, disasm, kgoel, Pancho, vijaycs85, cosmicdreams, dawehner, wamilton: Convert comment_reply() to a Controller.