[tor-bugs] #27707 [Core Tor/Tor]: Improve some v3 onion logs

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#27707: Improve some v3 onion logs
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     Reporter:  asn           |      Owner:  (none)
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: unspecified
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:  tor-hs easy tor-logs
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
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 I've been debugging lots of v3 logs lately and I noticed a few issues with
 them that can be improved:

 1)
 {{{
 set_descriptor_revision_counter(): Encrypted revision counter 118682 to
 -403149886
 }}}
 no need for `%ld` there, it's an `uint64_t`.

 2) On the client side when we fetch descriptors we have the following log
 message that displays the onion address and blinded key as a base64
 instead of the typical base32. We should unify the format to make grep
 easier:

 {{{
 [info] directory_launch_v3_desc_fetch(): Descriptor fetch request for
 service khXWrMUXYYW1so9/CIWe5kI7+nxcSYO9zd4Edl2IIz8 with blinded key
 QvyLoKg/B6musSsNfL4vMk2wD2HpiDsTU3gM7kY41Sg to directory
 $C0B7413D690411DF5D2B0D838F56792312697122~minitor at 185.143.62.9
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27707>
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