[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2436: "tahoe --version" shouldn't show scary diagnostic warnings

[Tahoe-LAFS]

#2436: "tahoe --version" shouldn't show scary diagnostic warnings
------------------------+--------------------
     Reporter:  warner  |      Owner:
         Type:  defect  |     Status:  new
     Priority:  normal  |  Milestone:  1.10.2
    Component:  code    |    Version:  1.10.0
   Resolution:          |   Keywords:
Launchpad Bug:          |
------------------------+--------------------

Comment (by daira):

 So in the example in the description, for instance, the output would be:
 {{{
 allmydata-tahoe: 1.10.0
 foolscap: 0.8.0
 pycryptopp: 0.6.0.1206569328141510525648634803928199668821045408958
 zfec: 1.4.24
 Twisted: 13.0.0
 Nevow: 0.11.1
 zope.interface: unknown
 python: 2.7.9
 platform: Linux-fedora_22-x86_64-64bit_ELF
 pyOpenSSL: 0.14
 simplejson: 3.7.2
 pycrypto: 2.6.1
 pyasn1: 0.1.7
 mock: 1.0.1
 setuptools: 0.6c16dev4
 pycparser: 2.10 [according to pkg_resources]
 six: 1.9.0 [according to pkg_resources]
 cryptography: 0.8.2 [according to pkg_resources]
 cffi: 0.8.6 [according to pkg_resources]
 pyasn1-modules: 0.0.5 [according to pkg_resources]
 enum34: 1.0 [according to pkg_resources]
 characteristic: 14.3.0 [according to pkg_resources]
 service-identity: 14.0.0 [according to pkg_resources]
 }}}

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2436#comment:7>
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