HISTORY writeQC

VERSION	DATE		DESCRIPTION
1.0	2007-05-23	released
1.1	2008-04-18	option -l  introduced
1.1.2	2008-10-16	MJD_SNAP, option -c  introduced
1.1.3	2009-07-15	bugfixes in getkey() for additional spaces after = sign, and for long path names and fitsort
1.2	2009-11-26	enable multiple PRO_CATG definitions per QC1_TABLE; new configuration key: SIMULATION=KEEP_TEMP
1.2.1	2010-03-04	bug fix in getkey
1.2.2	2010-06-10	bug fixes related to multiple PRO_CATG definitions
1.2.3	2012-11-08	bug fix in loop over variables
1.2.4	2013-01-15	bug fix in call of writeval in case keyword value contains blanks
1.2.5	2013-02-06	unset LANG variable in case this is set by environment
1.2.6	2013-12-19	allow multiple files with same PRO_CATG
1.2.7	2015-12-07	make grep for FILE_CATG in prepare function unique
1.2.8	2017-03-22	change VALUE assignment in getkey 
1.3	2018-07-25	handle same header key in different PRO.CATGs per table
1.3.1	2019-05-16	fix for empty comments