[filmon] Fix harmless -Wformat-security warning

Filmon addon contains a call to snprintf with a format string coming
directly from a function call, hitting "format not a string literal and
no format arguments" warning with -Wformat-security (and thus fails to
build if -Werror=format-security is used as some Linux distributions do).

There does not seem to be a security issue in this case, but modify the
snprintf() call to avoid the warning anyway.
[mythtv] Bump version 1.9.26
Merge pull request #387 from janbar/release-v1.9.26

[pvr.mythtv] Bump version 1.9.26
Merge branch 'fix/format-string' of https://github.com/anssih/xbmc-pvr-addons into anssih-fix/format-string
[pvr.filmon] bump version to 0.4.3
Merge branch 'anssih-fix/format-string'
change library name prefixes to "Kodi_"
bump all versions after the library name change
Merge pull request #389 from Jalle19/rebrand

Rebrand
forgot to update some makefiles (Windows search tricked me into
believing I had them all)
update the .dll names in the Release configuration too
Tidy up displayed PVR info that Kodi now shows (connection string, drive space, etc)
add support for accepting HDHR streaming URLs for channels