* Fix pcl-aex.1: validate PCLOUD_LOG_PATH before use in psync_debug_path()
Add pdbg_path_is_safe() helper that rejects PCLOUD_LOG_PATH values
that are not absolute, contain '..' path components, or do not resolve
under the user HOME directory or /tmp. On rejection, fall back to the
default ~/.pcloud/debug.log path and emit a warning to stderr.
Also fix a pre-existing memory leak: ppath_home() return was not freed
in the default-path branch.
Ref GH #291.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* Add PCLOUD_LOG_PATH path-safety tests (pcl-aex)
28 test cases covering relative paths, '..' traversal, paths outside
HOME and /tmp, valid accepted paths, and psync_debug_path() env
fallback behaviour.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Co-authored-by: Levi Neely <lkn@darkstar.example.net>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
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