Add no-crate filter option on rustdoc

[GuillaumeGomez]

@onur asked me about it so here it is!

r? @QuietMisdreavus

[QuietMisdreavus]

Just a nit on the wording of the flag, otherwise this looks good!

This is going to conflict with #57011, so whichever merges first will leave the other with a merge conflict.

[QuietMisdreavus]

--disable-per-crate-search

"disables generating the crate selector on the search box"

[rust-highfive]

The job x86_64-gnu-llvm-6.0 of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

travis_time:end:01243ef1:start=1545346558041760494,finish=1545346622112984869,duration=64071224375
$ git checkout -qf FETCH_HEAD
travis_fold:end:git.checkout
Encrypted environment variables have been removed for security reasons.
See https://docs.travis-ci.com/user/pull-requests/#pull-requests-and-security-restrictions
$ export SCCACHE_BUCKET=rust-lang-ci-sccache2
$ export SCCACHE_REGION=us-west-1
Setting environment variables from .travis.yml
$ export IMAGE=x86_64-gnu-llvm-6.0
---
[00:52:14] travis_fold:end:stage2-rustdoc
[00:52:14] travis_time:end:stage2-rustdoc:start=1545349764166532219,finish=1545349764474454938,duration=307922719
[00:52:14] thread '<unnamed>' panicked at 'No option 'no-doc-crate-filtering' defined', /cargo/registry/src/github.com-1ecc6299db9ec823/getopts-0.2.17/src/lib.rs:767:21
[00:52:14] [00:52:14] [00:52:14] [00:52:14] command did not execute successfully: "/checkout/obj/build/bootstrap/debug/rustdoc" "--html-after-content" "/checkout/src/doc/footer.inc" "--html-before-content" "/checkout/obj/build/x86_64-unknown-linux-gnu/doc/version_info.html" "--html-in-header" "/checkout/src/doc/favicon.inc" "--markdown-no-toc" "--index-page" "/checkout/src/doc/index.md" "--markdown-playground-url" "https://play.rust-lang.org/" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/doc" "/checkout/src/doc/rust.md" "--markdown-css" "rust.css"
[00:52:14] [00:52:14] [00:52:14] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap doc
[00:52:14] Build completed unsuccessfully in 0:04:04
[00:52:14] Build completed unsuccessfully in 0:04:04
[00:52:14] make: *** [all] Error 1
[00:52:14] Makefile:28: recipe for target 'all' failed
The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2.
travis_time:start:174daa12
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)
Thu Dec 20 23:49:24 UTC 2018
---
travis_time:end:05978768:start=1545349765220290677,finish=1545349765229557051,duration=9266374
travis_fold:end:after_failure.4
travis_fold:start:after_failure.5
travis_time:start:118ff8a8
$ cat ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers || true
cat: ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers: No such file or directory
travis_fold:end:after_failure.5
travis_fold:start:after_failure.6
travis_time:start:1b449bda
$ dmesg | grep -i kill

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

[GuillaumeGomez]

Updated.

[QuietMisdreavus]

We should also change this to something like generate_search_filter to match the CLI flag a little closer.

[GuillaumeGomez]

Updated.

[bors]

☔ The latest upstream changes (presumably #57063) made this pull request unmergeable. Please resolve the merge conflicts.

[GuillaumeGomez]

@bors: r=QuietMisdreavus

[bors]

📌 Commit dbcf689 has been approved by QuietMisdreavus

[bors]

⌛ Testing commit dbcf689 with merge 43d26b1...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: QuietMisdreavus
Pushing 43d26b1 to master...