too many threads

See #59, release log:

• 0d08772 by @yegor256: #59 join
• b16fa27 by @yegor256: #59 typo
• 656d779 by @yegor256: #59 show thread names
• 513b0f3 by @yegor256: #59 wait for 10 mins
• 503b520 by @yegor256: #59 show count of jobs
• af6b15a by @yegor256: #59 show total number of threa...

Released by Rultor 1.67.2, see build log