DEV-1920. Another thing to SQL highlighting
DEV-1920. Another thing to SQL highlighting

Add text/x-pgsql MIME type.
Extend sqlKeywords.

filonb/CodeMirror2,femhub/CodeMirror2,filonb/CodeMirror2,femhub/CodeMirror2,femhub/CodeMirror2,filonb/CodeMirror2