libxmp: Update to 4.4.1

4.4.1 (20161012):
Fix issues reported by Saga Musix:
- fix MDL c5spd to preserve base periods
- fix MDL sample decoder loop with corrupted data
- fix MASI loader OPLH and PPAN subchunks parsing
Other changes:
- fix MacOS Tiger build issues (reported by Misty De Meo)
- fix sample loop corner case (reported by knight-ryu12)
- fix set pan effect in multichannel MODs (reported by Leilei)
- fix global volume on module loop (reported by Travis Evans)
- fix IT pan right value (by NoSuck)
- fix MASI effects based on OpenMPT PSM loader
- fix memory leak in XMs with 256 patterns
- fix anticlick when rendering only one sample
- fix anticlick in His Master's Noise instruments
- fix anticlick in MED synth instruments

4.4.0 (20160719):
Fix bugs caught in the OpenMPT test cases:
- fix XM arpeggio in FastTracker 2 compatible mode
- fix IT bidirectional loop sample length
- fix MOD vibrato and tremolo in Protracker compatible mode
Fix multichannel MOD issues reported by Leilei:
- fix XM replayer note delay and retrig quirk
- fix XM replayer channel pan
- fix MOD loader period to note conversion
Fix issues reported by Lionel Debroux:
- fix virtual channel deallocation error handling
- fix S3M global volume effect
- fix IT envelope reset on tone portamento
- fix IT voice leak caused by disabled envelope
- fix IT volume column tone portamento
- fix XM envelope position setting
- fix FT2 arpeggio+portamento quirk with finetunes
- fix mixer anticlick routines
- accept S3M modules with invalid effects
Fix issues reported by Saga Musix:
- fix 669 effects when no instrument number is specified
- fix 669 effects to be frequency-based
- fix 669 initial tempo
Other changes:
- fix S3M channel reset on sample end (reported by Alexander Null)
- fix Noisetracker MOD speed setting (reported by Tero Auvinen)
- fix IT loader DCA sanity check (reported by Paul Gomez Givera)
- fix IT envelope reset after offset with portamento
- fix bidirectional sample interpolation
- fix mixer resampling and tuning issues
- add Antti Lankila's Amiga 500 modeling mixer
- add support to filter effect E0 in Amiga mods
- add flags to configure player mode
- add option to set the maximum number of virtual channels
- add frequency-based "period" mode
- add support to IT sample sustain loop
- limit Oktalyzer modules to MOD note range
- remove broken synth chip and Adlib emulation suport
- code refactoring and cleanup

4.3.13 (20160417):
Fix bugs caught in the OpenMPT test cases:
- fix IT volume column fine volume slide with row delay
Other changes:
- fix MOD vs XM set finetune effect
- fix IT old instrument volume
- fix IT panbrello speed
- fix IT random pan variation left bias
- fix IT default pan in sample mode (reported by Hai Shalom)
- fix S3M set pan effect (reported by Hai Shalom and Johannes Schultz)
- code refactoring and cleanup

4.3.12 (20160305):
Fix bugs caught in the OpenMPT test cases:
- fix IT note off with instrument
- fix IT note recover after cut
- fix IT instrument without note after note cut event
- fix IT pan reset on new note instead of new instrument
- fix IT volume swing problems
- fix XM glissando effect
- fix Scream Tracker 3 period limits
- fix Scream Tracker 3 tremolo memory
Other changes:
- fix IT pattern break in hexadecimal (reported by StarFox008)
- fix S3M subsong detection (reported by knight-ryu12)
- fix S3M/IT special marker handling (reported by knight-ryu12)
- fix Galaxy Music System 4.0 song length (reported by AntonZab)
- fix tone portamento memory without note (reported by NoSuck)
- fix IT pan swing limits
- Add TrackerPacker v1 format converter
- Add TrackerPacker v2 format converter
- Add ProPacker 1.0 format converter

(nia)