[tor-bugs] #4538 [Tor Relay]: Free global DH parameters before tor exit.

[Tor Bug Tracker & Wiki]

#4538: Free global DH parameters before tor exit.
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 Reporter:  asn        |          Owner:     
     Type:  defect     |         Status:  new
 Priority:  minor      |      Milestone:     
Component:  Tor Relay  |        Version:     
 Keywords:             |         Parent:     
   Points:             |   Actualpoints:     
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 Let's free `dh_param_p`, `dh_param_g` and `dh_param_tls` before exiting,
 for the sake of a clean valgrind profile.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4538>
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