Document pz:extendrecs
Avoid null ptr reference of se->reclist PAZ-856

Could happen if show occurs before a search in a session.
Allow session_log with session=NULL ptr
Pass integer for yaz_log %u

Not a string
Fewer messages when pz:extendfetch is not in effect
Fix check for pz:extendrecs
RPM: simplify make install rule
Remove unused client code
Reformat
Fix use of sizeof in nmem_malloc call

Now sizeof(char*) , rather than sizeof(char).
Reformat
Ensure show_range_start returns non-null

if session is still locked. So that show_records properly unlocks
again.
Version 1.6.28
XSD for the pz2 format
Allow the record element without collection
Check for Libxslt support PAZ-862
Documentation rebuilt if local.ent changes
Ignore local0.ent
Allow IPV6 addresses PAZ-841

for clients (databases).
Merge branch 'master' of ssh://git.indexdata.com/home/git/pub/pazpar2