help text (-h) depending on xxx

[andimik]

main changes

some typos:

• audiogain -> autogain
• typo fixed (of -> on)

help-text

• xxx replaced by name in helptext, for example

before

$ eti-cmdline-rtlsdr -h
 general eti-cmdline-xxx options are

   -P number    number of parallel threads for handling subchannels
   -D number   time (in seconds) to look for a DAB ensemble
   -M mode     Mode to be used 
   -B Band     select DAB Band (default: BAND_III, or L_BAND)
   -C channel  DAB channel to be used (5A ... 13F resp. LA ... LP)
   -O filename write output into a file (instead of stdout)
   -R filename (if configured) dump to an *.sdr file
   -S          be silent during processing
   -t          set record time
   -h          show options and quit
   -G number gain setting, depending on the version of the stick 
   -p number ppm setting 
   -Q autogain on

after

$ ./eti-cmdline-rtlsdr -h

 eti-cmdline-rtlsdr was compiled from 
 https://github.com/JvanKatwijk/eti-stuff/

 It is an experimental program for creating a
 stream of ETI frames from a selected DAB input channel.

 The options are

   -P number   number of parallel threads for handling subchannels
   -D number   time (in seconds) to look for a DAB ensemble
   -M mode     mode to be used 
   -O filename write output into a file (instead of stdout)
   -B Band     select DAB Band (default: BAND_III, or L_BAND)
   -C channel  DAB channel to be used (5A ... 13F resp. LA ... LP)
   -S          be silent during processing
   -t          set record time
   -G number   gain setting, depending on the version of the stick 
   -p number   ppm setting 
   -Q          autogain on

   -h          show options and quit

• adjusted the options according to the xxx
• placed -h to the end
• added homepage on top
• columns fixed
• show "dump" helptext only when compiled
• do not show option for channel in case of prerecorded files
• hint: the xml reader works, indeed

fixed xml name

• XMLFILES instead of XML_FILES
• renamed eti-cmdline-xml to eti-cmdline-xmlfiles

uses md syntax

• removed useless lines

[JvanKatwijk]

Thanks!!!