Scenario names with dots generate errors (Sympa 6.2.42)

[ogermes]

Scenario names with dots generate errors, examples :

• dot in the name of visibility scenario
  DIED: Can't call method "authz" on an undefined value at /usr/local/sympa/bin/wwsympa.fcgi line 2887.
  at /usr/local/sympa/bin/wwsympa.fcgi line 2887.
  main::check_param_out() called at /usr/local/sympa/bin/wwsympa.fcgi line 1590

• dot in the name of subscribe scenari
  DIED: Can't call method "authz" on an undefined value at /usr/local/sympa/bin/wwsympa.fcgi line 2679.
  at /usr/local/sympa/bin/wwsympa.fcgi line 2679.
  main::check_param_in() called at /usr/local/sympa/bin/wwsympa.fcgi line 1517

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Sympa version 6.2.42
Installation method

Install from source package

Expected behavior

No error, or prohibit scenario names with a dot

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Additional information

I have checked that renaming the scenario solves the problem.

[ikedas]

Duplicate of #589.