* perl/Amanda/Message.pm: Add a 'severity' to a message.
* perl/Amanda/Message.pod: Document severity.
* perl/Amanda/Tapelist.swg (new): Return an array of two elements,
  The first is the Amanda::Tapelist object, the second is a message.
* server-src/amadmin_perl.pl, server-src/amtape.pl: Handle new return
  value of Amanda::Tapelist->new, continue if it is a warning
  severity.
* perl/Amanda/DB/Catalog.pm, perl/Amanda/JSON/Tapelist.pm,
  perl/Amanda/Recovery/Planner.pm, perl/Amanda/Report/human.pm,
  perl/Amanda/Report/json.pm, server-src/amcheck-device.pl,
  server-src/amcheckdump.pl, server-src/amidxtaped.pl,
  server-src/amlabel.pl, server-src/amreport.pl,
  server-src/amrestore.pl, server-src/amrmtape.pl,
  server-src/amvault.pl, server-src/taper.pl: Handle new return
  value of Amanda::Tapelist->new, abort on any message.
* installcheck/Amanda_Changer.pl, installcheck/Amanda_Logfile.pl,
  installcheck/Amanda_Recovery_Clerk.pl,
  installcheck/Amanda_Tapelist.pl, installcheck/Amanda_Taper_Scan.pl,
  installcheck/Amanda_Taper_Scan_lexical.pl,
  installcheck/Amanda_Taper_Scan_oldest.pl,
  installcheck/Amanda_Taper_Scan_traditional.pl,
  installcheck/amlabel.pl, installcheck/amrmtape.pl,
  installcheck/amtape.pl: Handle new return value of
  Amanda::Tapelist->new.


git-svn-id: https://svn.code.sf.net/p/amanda/code/amanda/trunk@5436 a8d146d6-cc15-0410-8900-af154a0219e0
* common-src/conffile.c: Fix STORAGE_DEVICE_OUTPUT_BUFFER_SIZE init.
* device-src/xfer-dest-taper-splitter.c: Abort with better message if
  memory allocation fail.
* server-src/amcheck.c: Check device-output-buffer-size is nmot larger
  than physical memory.


git-svn-id: https://svn.code.sf.net/p/amanda/code/amanda/trunk@5438 a8d146d6-cc15-0410-8900-af154a0219e0