Fix scroll to highlighted line. Replace scrollTO js file with gem

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Replace jquery deprecated .live with .on
Add missing lines in update guide.
Version to 6.9.1.
Revert "Actually use the 'user_filter' configuration option"

This reverts commit e9d4587ff11c8510f01dfa184414f73d75b4550b, which is
incompatible with GitLab's built in LDAP user filter: a GitLab LDAP
filter is [added on top of the other filters used to find the
user](https://gitlab.com/gitlab-org/gitlab-ce/blob/982d4d51e8110bec280eb00db0fb756b062103d9/lib/gitlab/ldap/adapter.rb#L61)

Example GitLab LDAP filter: `(memberOf=cn=foo,dc=bar)`.

In contrast, an omniauth-ldap filter [replaces the 'normal'
filters](https://gitlab.com/gitlab-org/omniauth-ldap/blob/76d77543dec0c585bb4e974262f43675f9810953/lib/omniauth/strategies/ldap.rb#L55)

Example omniauth-ldap user filter:
`(&(uid=%{username})(memberOf=cn=foo,dc=bar))`.
Merge branch 'fix_ldap_user_filter' into '6-9-stable'

Fix LDAP user filter
Add to changelog v6.9.2
Version to 6.9.2.
Added the password reset link in the reset mail.

Since some of our users has reported problems with the link
for password reset in some mailclients, we decided to print
the url in plaintext as well as in the html format.
Removed HTTP-clone button

Removed the button for http-cloning for logged in users,
this his due to us wanting logged in users to clone via ssh.

The ability for http-cloning is still there and used for
public repositories.