Commits on Jun 28, 2019

1. Rollback back-end *node* engine support to LTS …

   * Keeping applicable TLS restricted for eventual 12.x+ compatibility
   * Search query *(modelQuery)* on, at the very least, `about` field causes maximum CPU usage in *node*@12.0.0 through *node*@12.5.0 but not v11.x or v10.x. This causes severe lag for everyone up to observed sustained 20+ seconds on queries.
   * Restarting and exposing with transforming to secondary indexing for Script model as per all [*mongoose*/MongoDB documentation](https://mongoosejs.com/docs/guide.html#indexes). Use `syncIndexes` to maintain DB indexes.
   * Squash new deprecation warning for OpenUserJS#1516
   
   NOTES:
   * This is going to be a major issue when v10.x is EOL'd if *node* and related dep issues *(mongoose, mongodb)* aren't resolved
   * For some reason *mongoose* is emitting the `index` event twice when used globally... unknown reason atm. Picking local disable in favor.
   
   Applies to OpenUserJS#1548 and post OpenUserJS#1603 with observed issue since then.
   
   Refs:
   * https://mongoosejs.com/docs/guide.html#indexes
   
   Dev startup:
   
   ``` console
   $ node app.js
   Starting application...
   Disabling GitHub `hooks` in unsecure mode
   S3rver initialized
   error: Error creating bucket. Bucket "openuserjs.org" already exists
   info: PUT /openuserjs.org 409 11ms -
   Default dev S3 bucket already exists
   MongoDB connection is opened
   Connected to MongoDB v3.6.12
   GitHub client authenticated
   Index event triggered/trapped for Script model
   Script indexes:
    [ { v: 2,
       key: { _id: 1 },
       name: '_id_',
       ns: 'openuserjs_devel.scripts' },
     { v: 2,
       key: { _authorId: 1, flagged: 1, isLib: 1 },
       name: '_authorId_1_flagged_1_isLib_1',
       ns: 'openuserjs_devel.scripts',
       background: true },
     { v: 2,
       key: { installName: 1 },
       name: 'installName_1',
       ns: 'openuserjs_devel.scripts',
       background: true },
     { v: 2,
       key: { isLib: 1, author: 1, name: 1 },
       name: 'isLib_1_author_1_name_1',
       ns: 'openuserjs_devel.scripts',
       background: true } ]
   ```
   
   Recent db stats:
   
   ``` console
   > db.scripts.aggregate( [ { $indexStats: { } } ] );
   { "name" : "_id_", "key" : { "_id" : 1 }, "host" : "<db>:<port>", "accesses" : { "ops" : NumberLong(12842), "since" : ISODate("2019-06-27T04:10:25.453Z") } }
   { "name" : "isLib_1_author_1_name_1", "key" : { "isLib" : 1, "author" : 1, "name" : 1 }, "host" : "<db>:<port>", "accesses" : { "ops" : NumberLong(7348), "since" : ISODate("2019-06-27T12:26:13.574Z") } }
   { "name" : "installName_1", "key" : { "installName" : 1 }, "host" : "<db>:<port>", "accesses" : { "ops" : NumberLong(144052), "since" : ISODate("2019-06-27T04:10:25.453Z") } }
   { "name" : "_authorId_1_flagged_1_isLib_1", "key" : { "_authorId" : 1, "flagged" : 1, "isLib" : 1 }, "host" : "<db>:<port>", "accesses" : { "ops" : NumberLong(16691), "since" : ISODate("2019-06-27T04:10:25.453Z") } }
   ```

   

   Martii committed Jun 28, 2019
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