IDEA-123710 Execute "lock" and "unlock" commands under terminal (if configured) as they require authentication
svn: Removed attempt to get "svn info" for HEAD revision in case of no local "svn info" found
IDEA-123784 Do not treat "svn cat" output as binary for Unix - as currently separate error and output streams are not supported
svn: Make ssh credentials be saved in memory by default for command line (like for other repository protocols and SVNKit)
svn: Disabled "Save credentials" checkbox when requesting ssh credentials for command line (as ssh credentials caching is not supported by svn)
EA-55850 (diagnostic)
Merge branch 'svn_18_3'