simple vim syntax for psyc packets

share/vim/ftdetect/psyc.vim

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+au BufRead,BufNewFile *.psyc set filetype=psyc

share/vim/syntax/psyc.vim

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+" Vim syntax file
+" Language: PSYC - syntax highlighting for protocol packets
+" Maintainer: carlo von lynX
+" Latest Revision: 2016-08-25
+
+if exists("b:current_syntax")
+  finish
+endif
+
+" PSYC2 syntax
+syn match psycSeparator /^|$/
+
+" PSYC1 syntax
+syn match psycSeparator /^\.$/
+
+" PSYC operators
+syn match psycSet /^:[a-z_].*$/
+syn match psycAssign /^=[a-z_].*$/
+syn match psycAugment /^+[a-z_].*$/
+" why doesn't this one work?
+syn match psycDiminsh /^\-[a-z_].*$/
+
+" should define a region instead, so that header rules
+" are not applied to body
+syn match psycMethod /^[a-z_]\+$/
+
+hi def link psycSeparator PreProc
+hi def link psycMethod Statement
+hi def link psycAssign Constant
+hi def link psycSet Identifier
+hi def link psycAugment Type
+hi def link psycDiminish Type
+
+let b:current_syntax = "psyc"