some kinds of important user configs are not possible to bake into built loader

[Rawld Gill]

For the profile.userConfig switch the build system only allows a decompiled object. Sometimes this won't work. For example, the default config

"this.dojoConfig || this.djConfig || this.require || {}"

is impossible to back into the build.

There will likely be other important examples; therefore, this profile switch ought to be optionally specifiable with a string.

[Rawld Gill]

In [26834]:

made profile.userConfig switch optionally a verbatum string; fixes #14072; !strict