There are four special characters in GDB's remote serial protocol:

- '$' (0x24): start of packet
- '}' (0x7D): escape
- '*' (0x2A): run-length encoding repeat count delimiter
- '#' (0x23): end of packet; start of checksum

In particular, the '#' and '}' characters are problematic since they
are often used in library filenames.  A few examples:

- %SystemRoot%\assembly\NativeImages_v[.NET ver]\[module+hash]#\*\*.dll
- {CLSID or UUID}\*\.dll

To make GDB happy with those filenames, we scan for those characters and
escape them properly.

While we are at it, also remove the assert in the packet_reply function
that checks for '$' and '#' in the packet payload.
Signed-off-by: Jinoh Kang <jinoh.kang.kr@gmail.com>
Signed-off-by: Rémi Bernon <rbernon@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>