cli: add 'q' as an alias for 'quit'

[prattmic]

Fixes #524

[prattmic]

Failures look like flakes, or at least not related?

=== RUN   TestHTTPSInsecure
    TestHTTPSInsecure: proftest.go:125: unexpected error: https+insecure://127.0.0.1:57468/debug/pprof/goroutine: server response: 400 Bad Request - "seconds" parameter is not supported for this profile type
        
    TestHTTPSInsecure: fetch_test.go:590: failed to fetch any source profiles
--- FAIL: TestHTTPSInsecure (0.02s)
=== RUN   TestHTTPSWithServerCertFetch
    TestHTTPSWithServerCertFetch: proftest.go:125: unexpected error: https://localhost:57470/debug/pprof/goroutine: server response: 400 Bad Request - "seconds" parameter is not supported for this profile type
        
    TestHTTPSWithServerCertFetch: fetch_test.go:705: failed to fetch any source profiles
--- FAIL: TestHTTPSWithServerCertFetch (0.02s)

[wyk9787]

Failures look like flakes, or at least not related?

=== RUN   TestHTTPSInsecure
    TestHTTPSInsecure: proftest.go:125: unexpected error: https+insecure://127.0.0.1:57468/debug/pprof/goroutine: server response: 400 Bad Request - "seconds" parameter is not supported for this profile type
        
    TestHTTPSInsecure: fetch_test.go:590: failed to fetch any source profiles
--- FAIL: TestHTTPSInsecure (0.02s)
=== RUN   TestHTTPSWithServerCertFetch
    TestHTTPSWithServerCertFetch: proftest.go:125: unexpected error: https://localhost:57470/debug/pprof/goroutine: server response: 400 Bad Request - "seconds" parameter is not supported for this profile type
        
    TestHTTPSWithServerCertFetch: fetch_test.go:705: failed to fetch any source profiles
--- FAIL: TestHTTPSWithServerCertFetch (0.02s)

Related to #526. Working on the fix to pass those tests.

[codecov-io]

Codecov Report

Merging #525 into master will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           master     #525   +/-   ##
=======================================
  Coverage   67.05%   67.05%           
=======================================
  Files          37       37           
  Lines        7627     7627           
=======================================
  Hits         5114     5114           
  Misses       2105     2105           
  Partials      408      408           

Impacted Files	Coverage Δ
internal/driver/commands.go	44.00% <0.00%> (ø)
internal/driver/interactive.go	61.65% <0.00%> (ø)

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