fix request_auth not removing the trailing newline from the user name

add configured namespaces to the dav context

fix dav_set_string_property crash if an unknown namespace prefix was specified

actually make sure some random things don't explode

fix incorrect memory management when loading file parts from the sync db

close branch ucx-3.1 ucx-3.1

merge branch ucx-3.1

fix incorrect stat flags on linux in metadata test scripts

compatibility with UCX 3.1 plus several minor code fixes ucx-3.1

add more xattr malloc checks

remove disabled realloc debug code from libxattr

improve xattr code

(0) -300 -100 -12 +12 tip

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