D24750: Fix reading environment variables with newline

[Fabian Vogt]

fvogt created this revision.
fvogt added reviewers: Plasma, apol.
Herald added a project: Plasma.
fvogt requested review of this revision.

REVISION SUMMARY
  Use '\0' as separator as '\n' is likely to appear in values.
  
  BUG: 413130

TEST PLAN
  /etc/profile.d/mc.sh exported an mc() function,
  which resulted in "syntax error: unexpected end of file" in the Plasma session.
  Now the mc function is correctly set in the environment.

REPOSITORY
  R120 Plasma Workspace

BRANCH
  Plasma/5.17

REVISION DETAIL
  https://phabricator.kde.org/D24750

AFFECTED FILES
  CMakeLists.txt
  startkde/plasma-sourceenv.sh
  startkde/startplasma.cpp

To: fvogt, #plasma, apol
Cc: plasma-devel, LeGast00n, The-Feren-OS-Dev, jraleigh, fbampaloukas, GB_2, ragreen, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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