Merge remote-tracking branch 'origin/feature/calc-cksum-only-if-enabl…

…ed' into feature/calc-cksum-only-if-enabled

* origin/feature/calc-cksum-only-if-enabled:
  Only calculate hash for ssh host color if option is enabled
  CHANGES: Credit @Rycieos for liquidprompt#461
  LP_COLOR_HOST_HASH: simplify
  Fix computing hostname hash on SunOS
  don't try to unexport PROMPT_COMMAND on bash < 4.2 (GH liquidprompt#474)
  Fix LP_ENABLE_FQDN regression: s/_LP_HOST_SYMBOL/LP_HOST_SYMBOL/ GH liquidprompt#472
  unexport PROMPT_COMMAND (GH liquidprompt#450, liquidprompt#463)
  Fix up awk script and make readable
  CHANGES: release 1.11
  ISSUE_TEMPLATE: request shell name