PHK_PSF: Fix E_STRICT warning
PHK_Stream: no reason to extend PHK_Util
PHK_Stream: fix typo
Rename and change value of PHK mount flags

Make flag names consistent with Automap load flags
Ensure separate bits from Automap flags and transmit PHK mount flags to Automap when loading package map.
PHK_TFile: Fix EOL conversion
PHK_PSF: Don't parse options for every commands

A line like 'set flag --strip' was wrongly rejected.
Also, in 'add' lines, refuse absolute path args only when target path is not set.