New global/volume option "ignored attributes"

Can be used to ignore Finder locks by setting "ignored attributes = all".
From FR#80.
Fix parsing of address[:port] strings for IPv6 addresses, bug #515
Use reentrant getpwuid_r() to avoid possibe crash in set_groups()

Fixes bug #518.
Bump libatalk version info
update doc
map acls and follow symlinks
Merge pull request #2 from hat001/doc-fix

update doc
Merge remote-tracking branch 'github/branch-netatalk-3-0' into branch-netatalk-3-0
Merge remote-tracking branch 'origin/branch-netatalk-3-0' into develop

Conflicts:
	include/atalk/globals.h
	libatalk/util/netatalk_conf.c
Rewrite Spotlight documentation, remove references to RDF