ScGlobal::OpenURL: support relative references as URI references in hyperlinks

Instead of failing with "is not an absolute URL" error.

For example in the HYPERLINK() spreadsheet function where Excel
supports it, but also anywhere else that calls OpenURL(). A
relative reference is relative to the current document, or for yet
unsaved documents or if no object shell is available relative to
the work path, as usual.

Additional benefit is that "\\" UNC path names are accepted as
smb:// Samba shares and DOS \ path name separators resolved for a
proper file:// URI.

Users are asking for this, found no related tdf# bug/RFE. See
https://ask.libreoffice.org/en/question/160280/relative-and-absolute-hyperlinks/
and other linked q&a therein.

Change-Id: Ib314b71d68fbe1793ec614cbf7c0c058fad14a10
Reviewed-on: https://gerrit.libreoffice.org/57277
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Jenkins

0 files changed, 0 insertions, 0 deletions