This pull request solves issue #257

http://www.sympa.org/manual/ to https://sympa-community.github.io/manual/

Issue #234: Sympa ldap search escapes chars incorrect

Updates for bcrypt support

Issue #240: Unable to edit owners/subscribers

[bug] As the field date_admin and date_subscriber are no longer used but they have NOT NULL constraint, they should be deleted.

* avoid errors about undef values in strings from Perl strict mode
* only accept old hashes when password_hash_update is set to true

upgrade_sympa_password.pl.in:
* new command line options and associated POD documentation
* support for precaching hashes (useful for big sites using bcrypt)
* measure how long it takes to generate a hash (useful for bcrypt users)
* report on progress every 100 users processed when in verbose mode

wwsympa.fcgi.in: fix calling order for List->new(): should be (list, robot)

Fixed by:
  - Canonicalizing value of attrs1 as DN, if it is search base or root of it.
  - Escaping it as attributevalue in DN otherwise.

WWSympa: Dates in "subscriber option" page are shown in epoch format

Separate namespace for modules providing web interface: Alternative.
Suggested by racke.

Small refactoring: session_table_ttl and anonymous_session_table_ttl parameters aren't overridable by robot context.

Fix bug by change of issue #172 by ikedas

Feature: support for Bcrypt password hashes by mpkut